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I'll now turn the call over to Sanjay.

Sanjay Mehrota -- President and Chief Executive Officer

Thank you, Farhan. Good afternoon, everyone. In the first quarter, we demonstrated solid execution, further improved our balance sheet, and began executing on our $10 billion share buyback program. We delivered strong profitability despite revenue headwinds from the inventory adjustments at several customers and industrywide CPU shortages. Our results also reflect our success in further diversifying our business, as evidence by record sales in our mobile, automotive, and industrial businesses in the quarter.

As we enter calendar 2019, we are seeing weakening demands from our customers. As a result, we are taking decisive actions, including a meaningful reduction in our fiscal 2019 CapEx plan in both DRAM and NAND, that could materially reduce our supply base growth. I'll provide more details on these items later in the call, after first reviewing the highlights of the quarter.

I'll start with our execution progress. We are focused on improving our cost structure and increasing the mix of high-value solutions in our portfolio, both of which provide immediate benefits and strengthen Micron's ability to drive long-term profitable growth. Our cost reductions in DRAM and NAND have meaningfully outpaced the industry over the last three years. Our progress on advanced technology gives us confidence that we will deliver healthy year-over-year cost declines in DRAM and NAND in fiscal 2019, even after taking into account the supply and CapEx changes which I referenced earlier.

In the first quarter, we achieved crossover of 1X nanometer DRAM shipments and started revenue shipments of 1Y nanometer products. Our 1Y DRAM is ahead of schedule and we remain on track for meaningful production by the fiscal third quarter. We're also making excellent progress on our 1Z technology, which leverages our leadership in advanced materials and cost-effective lithography techniques.

In NAND, we continue to lead with our QLC product offerings and have introduced both consumer QLC NVMe SSDs and enterprise QLC SATA SSDs. In the first quarter, we started shipping 96-layer NAND products. The yields on 96-layer are ahead of plan. We remain focused on increasing the mix of high-value solutions in our portfolio and investing in differentiated products for our customers.

In DRAM, we introduced our 1Y nanometer 12 gigabit low-power DRAM, which offers the highest density available for the mobile market. We have seen strong demand for this product as the market continues to move toward higher densities. In NAND, high-value solutions now represent over 50% of our NAND base, which is an important milestone for us. The improving mix of high-value solutions increases our gross profit opportunity and provides better margin stability.

The strength of our high-value solutions this quarter, which was driven by managed NAND products, helped us maintain overall NAND gross margins above 45% despite industry over-supply. We strengthened our No. 1 share position in SATA enterprise SSDs, gaining about three percentage points of market share sequentially according to industry reports.

In addition to the QLC consumer NVMe SSD mentioned earlier, we also introduced the industry's first 1 terabyte TLC NVMe automotive SSD in the first quarter. We are working to further expand our NVMe product portfolio and plan to introduce SSDs targeting client, enterprise, and cloud markets through the course of calendar 2019.

Looking ahead, we expect the SSD market opportunity will continue to shift from SATA to NVMe. Fiscal 2019 will be a year of transition for our SSD portfolio and we expect our SSD share gains to resume in fiscal 2020. In the meantime, the growth of our high-value NAND solutions in fiscal 2019 will be driven by our mobile managed NAND products, where we believe we have significant opportunity to increase share.

In the first quarter, we shipped multiple high-capacity, high-performance USS solutions, nearly tripling our bit shipments quarter-over-quarter. We continue to make good progress in developing high-value solutions using our 3D XPoint technology and plan to introduce differentiated products toward the end of calendar 2019, as previously discussed. Our conviction in the opportunities ahead is reflected in our October announcement that we intend to exercise our option to acquire Intel's interest in the IMFT facility in Lehi, Utah early in calendar 2019.

Now, turning to end markets, I will start first with mobile, where we set records for revenue, gross margins, and operating margins in the first fiscal quarter. In addition to strong seasonal sales, we benefited from major product wins, with several customers, which is driving our managed NAND share gains. We are seeing strong demand elasticity in this market and within our NCP portfolio, our average NAND density was up over 25% sequentially and over 150% year-on-year.

Content growth also continued to do well in mobile DRAM, with more than 25% growth in density per unit shipped on a year-on-year basis. We expect content growth to continue in mobile devices, driven by broader use of artificial intelligence and the increasing number of cameras in the average smartphone. These elements will become pervasive while the industry readies for 5G implementation.

In data center markets, we saw reduced revenue coming off a record setting fiscal fourth quarter, due primarily to inventory adjustments at our customers. We expect this headwind will persist for a couple of quarters. We are seeing some cloud customers go through a digestion period following very strong growth over the last two years. We believe we are still in the early innings of cloud growth and long-term end customer demand trends remain strong in this market. Our engagement with our customers continues to be deep and now includes collaboration on our 3D XPoint product roadmap.

Higher density DRAM products are seeing stronger demand across the data center market. Revenue from our high-density 64-gigabyte DRAM modules grew more than 50% quarter-over-quarter. We have focused on the upcoming industry transition from 8 to 16 gigabit DRAM and expect to start sampling our new 16-gigabit DRAM by our fiscal third quarter.

In graphics, we started volume ramp of our high-performance GDDR6 memory and are working closely with our key customers in this segment. Higher than normal inventories in gaming cards and the fall off in crypto-related demand created revenue headwinds which we expect to continue for a couple more quarters.

Looking ahead, we see broadening interest in high-performance graphics memory for AI enablement in segments like data center and automotive. Our product leadership in GDDR6 is already creating new opportunities in these segments.

Turning to markets requiring our long lifecycle products, in the fiscal first quarter, we had record revenue in auto and industrial markets with a sequential expansion in gross margins. Strength in automotive continues to be driven by increasing demand for in-vehicle infotainment and advanced driver assistance systems. As a result, we see strong demand for our latest generation of automotive products. In November, we announced a collaboration with BMW to define and validate next-generation automotive solutions. This is another proof point of Micron's leadership in automotive and the growing criticality of memory and storage to leading-edge automotive applications.

Turning to our DRAM industry outlook, as I have mentioned previously, DRAM demands weakened through the course of our fiscal first quarter. Since the start of this fiscal second quarter, the weakening demand trend has continued and our near-term visibility is limited. Due to a lengthy period of rising DRAM prices, we believe some of our customers had decided to carry higher than normal inventory levels and as DRAM supply caught up with demand, these customers are bringing down their inventory levels. Smartphone unit demand is also continuing to weaken, particularly at the high end, in what is seasonally a slow quarter for mobile. Lastly, we are continuing to see the impact of CPU shortages.

While our customers end market demand in segments like industrial, cloud, enterprise, and client compute is healthy, this inventory adjustment period will contribute to weaker demand conditions in DRAM that will likely persist through the first half of calendar 2019. We now expect DRAM bit demand growth for the industry in calendar 2019 at approximately 16% compared with our prior expectation of approximately 20%. Even after factoring in the recent CapEx curves publicly announced across the industry, DRAM supply growth is tracking above our view of demand growth in calendar 2019.

Given this supply and demand dynamic, we are taking decisive actions to lower our DRAM bit output growth to approximately 15% for calendar 2019 versus our prior plan of around 20% bit growth. These actions include a significant reduction to our capital expenditures in fiscal year 2019. Based on our current demand estimates, our DRAM bit shipments for the fiscal second quarter will decline sequentially but, more importantly, are likely to be flat to down on a year-over-year basis as well, consistent with a weak quarter for the memory industry and significantly below the long-term demand growth rate. This shows that inventory adjustments by our customers are well under way.

Barring weaker macroeconomic conditions, we expect our DRAM bit demand to grow sequentially in our fiscal third quarter. Looking beyond fiscal Q3, as we enter the second half of calendar 2019, we expect a healthier demand environment alongside an improved industry supply picture, which should contribute to improved financial performance.

In NAND, while the inventory levels at customers are in better shape, NAND suppliers appear to have elevated levels of inventory. The transition from Planar to 3D NAND in the industry and successful ramp of 64-layer across the NAND manufacturers has resulted in oversupply in the market over the last several quarters. We currently expect calendar 2019 NAND industry bit demand growth to be approximately 35%, with ongoing impacts due to client compute CPU shortages and weaker high-end smartphone unit demand.

Even after taking into account recently publicly announced NAND CapEx reductions for calendar 2019, our assessment is that the NAND industry supply growth will exceed industry demand growth in the coming calendar year. We are therefore lowering our 2019 planned NAND bit growth and further reducing our fiscal 2019 NAND CapEx. We now expect our calendar 2019 NAND supply bit growth to be meaningfully reduced from prior expectations and expect our bit shipment growth to be in line with the industry demand at approximately 35%. We also expect NAND demand to accelerate in the second half of the calendar year, as demand elasticity kicks in for the mobile, enterprise, and client markets.

Given our attractive cost structure on leading-edge NAND and DRAM, in this market environment, we will manage pricing and carry inventory as necessary to optimize our profitability. We are taking decisive action on the supply side to manage our business in a prudent fashion, with an eye toward delivering a robust return on our investments. Our actions will significantly reduce our fiscal 2019 CapEx and allow us to continue delivering strong profitability and healthy free cash flow while investing in our strategic priorities as we position Micron to capitalize on the exciting growth opportunities for the company.

I'll now turn it over to Dave to provide financial details of our fiscal first quarter and guidance for the second quarter.

Dave Zinsner -- Senior Vice President and Chief Financial Officer

Thanks, Sanjay. Micron delivered strong results in our fiscal first quarter, including double-digit year-over-year growth in revenue, gross profits, and earnings per share. While our near-term outlook has become more challenging, the actions taken to improve our cost structure and increase our mix of high-value solutions will ensure that our profitability profile remains strong. Moreover, Micron's financial position remains healthy, with an improved net cash position and with total liquidity reaching our target levels.

Total fiscal first quarter revenue was $7.9 billion, up 16% from the prior year and down 6% from the record fiscal fourth quarter. Revenue was adversely impacted by inventory adjustments at key customers in the cloud, graphics, and enterprise markets. Offsetting these headwinds, we delivered record revenue in the mobile, industrial, and automotive markets.

DRAM represented 68% of total company revenue in the fiscal first quarter. DRAM revenue increased 18% year-over-year and declined 9% from the prior quarter. On a blended basis, DRAM ASPs declined high-single digits percent compared to the prior quarter, while shipment quantities were relatively flat.

Trade NAND revenue represented 28% of total company revenue in the fiscal first quarter. Trade NAND revenue increased 17% year-over-year and declined 2% quarter-over-quarter. Our overall NAND ASP declined in the low to mid-teens percent and shipment quantities increased in the low to mid-teens percent compared to the prior quarter.

Now, turning to our revenue trends by business unit, revenue for the compute and networking business unit was $3.6 billion, up 12% year-on-year and down 17% quarter-on-quarter. The sequential decline was driven by the impact of inventory adjustments at some of our customers in the graphics, enterprise, and cloud markets.

The mobile business unit delivered a strong quarter, with record revenue of $2.2 billion. Revenue increased 62% year-over-year and 17% from the prior quarter. Revenue growth was driven by the continued strength of our low-power DRAM offerings and share gains in our mobile managed NAND business with several leading handset customers.

Embedded business unit revenue of $933 million was up 12% year-on-year and up 1% quarter-on-quarter. The automotive and industrial businesses had record revenue, driven by strong sales of our DRAM and NOR products.

And, finally, turning to the storage business unit, or SBU, fiscal first quarter revenue was $1.1 billion, down 17% year-on-year and 8% quarter-on-quarter. The sequential decline in revenue was driven by weaker pricing and the ongoing transition from SATA to NVMe SSDs. The impact of this transition will continue through calendar 2019. Our strategy to move bits from SBU components to high-value solutions in mobile is also contributing to a decline in revenue for SBU.

The consolidated gross margin for the fiscal first quarter was 59%, up 360 basis points from the prior year and down approximately 230 basis points from the prior quarter. This includes a 120 basis point impact from 3D XPoint underutilization costs. During the last few months, we successfully leveraged our global supply chain to mitigate the impact of the China trade tariffs to less than 50 basis points to our consolidated fiscal first quarter gross margin. We expect to be able to mitigate approximately 90% of the impact from tariffs starting January 2019. We believe that Micron will not be directly impacted by any expansion of trade tariffs to additional product categories.

Operating expenses were $783 million, slightly above our guidance, mainly due to higher than expected prequalification expenses associated with new product introductions. Looking forward, as our joint development work with Intel comes to a conclusion around the end of this fiscal year, the R&D cost-sharing between the companies will naturally reduce and come to an end. In the fiscal first quarter, Intel's share of joint R&D expenses was approximately $30 million. We expect that our R&D expenses will continue to increase in the coming quarters, due to the combination of these declining R&D contributions from Intel as well as increased investments in future technologies and high-value solutions across our portfolio.

We continued to drive strong profitability in the fiscal first quarter, with operating income of $3.9 billion, representing 49% of revenue. This margin is up three percentage points year-over-year and down three percentage points from the fiscal fourth quarter. As previously mentioned, the improvements that Micron has made over the prior several years have resulted in structurally higher margins.

The tax rate for the fiscal first quarter was 10% and we expect our fiscal year 2019 tax rate to be around 11%.

Non-GAAP earnings per share in the fiscal first quarter totaled $2.97, up from $2.45 in the year-ago quarter and down from $3.53 in the prior quarter.

We commenced our capital return program in the fiscal first quarter with the repurchase of $1.8 billion of common stock, representing a reduction of approximately 42 million shares or about 3.5% of shares outstanding. We expect to remain active with our stock buybacks in the fiscal second quarter, as we continue to make progress on our $10 billion repurchase program by returning at least 50% of our ongoing free cash flows to shareholders.

Turning to cash flows and capital spending, in the fiscal first quarter, we generated $4.8 billion in cash from operations, representing 61% of revenue. Capital spending, net of third-party contributions, was $2.5 billion, up from $2.1 billion in the prior quarter. In the fiscal first quarter, our free cash flow was approximately $2.3 billion, up about $600 million from the year-ago quarter and down approximately $750 million from the prior quarter. We deployed approximately 80% of the quarter's free cash flow toward our share repurchase program.

Even with a substantial outlay for share repurchases, we ended the fiscal quarter in a record net cash position of $3.1 billion, with approximately $7.2 billion in cash, marketable investments, and restricted cash and $4.1 billion in debt. While we largely completed our deleveraging activities in fiscal year 2018, we further reduced our debt balance in the quarter by approximately $500 million through the settlement of outstanding convertible note redemptions of $160 million and other scheduled payments. Overall, our solid balance sheet, strong cash flow, and robust liquidity put us in an excellent position to execute on our capital returns program.

Prior to issuing our fiscal second quarter guidance, I'd like to provide some context for our outlook. Due to the weaker demand environment, we expect fiscal second quarter sequential bit shipments to be down meaningfully for both NAND and DRAM. Given the weaker near-term outlook, we are lowering our CapEx plans to a range of $9 billion to $9.5 billion for fiscal 2019. At the midpoint, this represents a $1.25 billion reduction from our prior guidance and our front-end equipment CapEx is now down year-on-year. We'll continue to remain flexible with capital spending to respond to market conditions.

With that in mind, our non-GAAP guidance for the fiscal second quarter is as follows. We expect revenue to be in the range of $5.7 billion to $6.3 billion and gross margins to be in the range of 50% to 53%. Operating expenses are expected to be $800 million plus or minus $25 million. As we execute on longer-term growth investments, we're actively managing OpEx by implementing expense controls across the company, including tighter controls on headcount, holiday work schedule slowdowns, and reductions in discretionary spending. Based on a share count of approximately 1.15 billion fully diluted shares, we expect EPS to be $1.75 plus or minus $0.10.

In closing, Micron continues to deliver solid financial results on a stronger performance foundation. We are making progress on all of our key initiatives, including our high-value solutions product portfolio, our cost profile, capital return program, and financial structure, with a record net cash position and $9.7 billion of liquidity at the end of the fiscal first quarter. While near-term market conditions are challenging, we are taking appropriate steps to manage production and spending in order to deliver healthy profitability and cash flows. There is no doubt Micron remains in the strongest financial position in the company's history as we transition to next-generation technologies and products.

I'll now turn the call over to Sanjay for some concluding remarks.

Sanjay Mehrota -- President and Chief Executive Officer

Thank you, Dave. While we end calendar 2018 on the heels of unprecedented profitability and revenue for both Micron and the industry, we do believe we are entering a period of weaker market conditions. We are taking prudent actions to adapt our manufacturing plans to the changing demand environment. While we are implementing expense controls, we are also continuing to invest in our technology and cost competitiveness, as well as strengthening our portfolio of high-value solutions.

Memory and storage have become essential ingredients to the value created by the data economy and it is this added value that is driving a virtual cycle of long-term growth and innovation. We continue to believe that the memory industry is structurally stronger, with more diversified demand drivers and moderating supply growth capability. Micron is better positioned than ever before to win in this environment, with our strong balance sheet and the structural improvements we have made to our operating model in the past several years. We believe 2019 will be a year of solid profitability and I look forward to sharing our results over the quarters ahead. We will now open for questions.

Questions and Answers:

Operator

Thank you, sir. Ladies and gentlemen, at this time, if you would like to ask a question over the phone, press "*1" on your telephone keypad. We ask everyone who is participating in today's Q&A session kindly limit yourself to one question and one follow-up and then you may requeue. If your questions have been answered or you wish to remove yourself from the queue, simply press "#".

And our first question will come from the line of Timothy Arcuri with UBS. Your line is now open.

Timothy Arcuri -- UBS Securities -- Analyst

Thank you. Sanjay, I was wondering if you could help quantify the inventory at your big hyperscale customers. It sounds like, in aggregate, it's maybe two months. So, I'm wondering if you can help with that number. Thank you.

Sanjay Mehrota -- President and Chief Executive Officer

Inventory at our customers, and this is customers in various segments of our market, some of those customers are getting higher levels of inventory and that inventory level varies from customer to customer, we believe. And our assessment is that inventory adjustments will take a couple of quarters for it to be corrected, for it to work through the system entirely. And, of course, we continue to work with our customers in the meantime, in terms of understanding their longer-term demand requirements. And, certainly, our customers are indicating optimism toward the demand requirements in the second half of the year.

And especially as inventory adjustments work through the system and as supply cuts, the effect of those comes through the industry, as well as second half of the calendar year tends to be seasonally stronger compared to the first half of the year, we do expect that by the second half of the year, we'll have an environment that will be improved, stronger compared to the first half of the year.

And just keep in mind that the long-term demand trends in our end markets of cloud, client, enterprise, graphics, all of these end markets, the trends continue to be strong, needing more memory and more storage, ultimately. We are just going through an air pocket here related to, primarily, inventory adjustments, as well as some seasonal weak mobile demand, including mobile demand on the high-end smartphones that is impacting some of our near-term visibility as well as the near-term outlook.

Timothy Arcuri -- UBS Securities -- Analyst

Thank you for that. And then just as a quick follow-up, Dave, so I think maybe the surprise in the guidance is that the bit shipments are down, I think you said "meaningfully" for both NAND and DRAM. I'm wondering what that means for inventories. Are you going to ship out of inventory or are you cutting utilization? Can you sort of walk us through that? Thank you.

Dave Zinsner -- Senior Vice President and Chief Financial Officer

So, we are reducing our production for both DRAM and NAND. As Sanjay indicated, from a DRAM perspective, we're bringing bit supply growth down to 15% approximately in calendar year 2019. For NAND, we're also bringing the production down meaningfully. And we did indicate that we would ship close to demand for NAND and we think that demand is about 35%. So, obviously, there will be periods of time where we do have inventory increasing for some period of time and then, of course, it will adjust down through the year as those demand and supply numbers get more aligned. In the first quarter, we had days of inventory up to 107 days and very comfortable with 107 days. This is very low cost product that we're putting on the balance sheet. There's no risk around obsolescence. It's very likely that it will go up again next quarter. Again, I'm very comfortable with that. But I think over the long-term, we'll have it more aligned with ultimately where we want it to be.

Timothy Arcuri -- UBS Securities -- Analyst

Thank you, Dave.

Operator

Thank you. And our next question will come from the line of John Pitzer with Credit Suisse. Your line is now open.

John Pitzer -- Credit Suisse -- Analyst

Yeah. Good afternoon, guys. Thanks for letting me ask the question. Dave, just relative to the guidance for OpEx in February quarter of $800 million plus or minus $25 million, does that now reflect what we should think about as a fully burdened OpEx as you kind of move away from the shared cost with Intel? And relative to the $6 billion of operational efficiency gains you talked about at the Analyst Day this past summer, how does that fit in with this OpEx guide? Because this is about $200 million more OpEx per quarter than we saw at similar revenue levels back in sort of '16, '17, and it's about $300 million above, per quarter, what we saw kind of in the '15 correction.

Dave Zinsner -- Senior Vice President and Chief Financial Officer

Yeah, good question. So, we did guide $800 million for OpEx in the second quarter, plus or minus $25 million. That's certainly not fully burdened. We had about $30 million of benefit in the first fiscal quarter related to Intel's contribution to R&D expenses. It'll be a little bit less in the second quarter but over the course of the rest of the year, it will kind of phase down. So that certainly will elevate the OpEx in the third and fourth quarter relative to the second quarter.

And, also, while we're certainly managing expenses prudently and we are taking steps, in terms of reducing discretionary spending and just monitoring our headcount very closely, we still are making the necessary investments on the product side and the technology side. This is, as Sanjay mentioned, an air pocket. We don't want to, in any way, impact our long-term strategy for some sort of near-term event. So OpEx will likely go up a little bit. It's a fair point on the OpEx. I would say, if you look at the guidance for the second quarter, even with the revenue guidance we gave, relative to what the first quarter was like, if you take the kind of midpoint of the earnings number and the midpoint of the revenue guidance number, you'll get kind of 38%+ operating margin.

So, that is a really good number, obviously. It's a number, in my previous company, we were kind of aspirationally trying to get to. So, it's a very good operating margin number. And I think it reflects the fact that we achieved the $6 billion of improvements that we said we would make at the Analyst Day. We still think we have more work to do, in terms of driving the mix toward high-value solutions, in terms of improving our cost competitiveness, both on the front-end and on the back-end side, so there's more to come. There's another $3 billion that we committed and we feel very good about that.

John Pitzer -- Credit Suisse -- Analyst

And as my follow-up for Sanjay, can you just walk us through the strategic puts and takes of building inventory into the February quarter as opposed to trying to let those bits out into the marketplace and let elasticity sort of take over? Is this sort of a tangible reflection of your view that this will be relatively short-lived, a couple of quarters, and what would you need to see before you would think that inventory build was too risky?

Sanjay Mehrota -- President and Chief Executive Officer

So, I think you know our inventory cost structure is very good, both on DRAM as well as on the NAND side. And so we are definitely prepared, in terms of managing our overall profitability, which is absolutely our primary focus. We manage pricing and manage inventory accordingly. As necessary, if inventory has to be carried over, we will carry it over because the demand in NAND will kick in with elasticity. In DRAM, the inventory consumption with our customers will occur. Supply curves will be driving return to stronger demand environment in the second half compared to the first half.

So we will be using inventory as a lever to ultimately manage for the best profitability of the company. And, certainly, be prepared. Use that inventory as necessary to also capitalize on the second half opportunities. And our focus really will also remain, in terms of our CAGR, in terms of output growth, to be aligned with the demand CAGR. And we'll, of course, from time to time, use inventory as a lever to manage the profitability of our business and, of course, manage our customers' requirements as well.

John Pitzer -- Credit Suisse -- Analyst

Thank you.

Operator

Thank you. And our next question will come from the line of C.J. Muse with Evercore. Your line is now open.

CJ Muse -- Evercore -- Analyst

Yeah. Good afternoon. Thank you for taking my question. I guess, first question, can you talk about what you're thinking in terms of cost-down efforts both for DRAM and NAND, particularly as you move to higher value solutions, changing mix, including 1Y, 1Z, as well as 96-layer in the '19 timeframe?

Sanjay Mehrota -- President and Chief Executive Officer

With respect to the cost structure, we continue to be in very good position, as we said. For our fiscal year '19, we'll have healthy cost reductions both for NAND as well as for DRAM. And you're, of course, right to note that as we increase the mix of our high-value solutions -- for example, over the longer term, as we increase our SSD mix or increase our management solutions -- those do tend to incur higher costs but they also bring higher margins, higher profitability, high pricing associated with them as well. So, cost-wise, we are in good shape.

CJ Muse -- Evercore -- Analyst

That's helpful. And I guess as a follow-up, a question for you Dave. I think in the past you've talked about wanting to have liquidity, including gross cash and revolver, of roughly one year CapEx, which would basically put you on the screws here. So, the question is how to think about incremental free cash flow generation and what percentage of that would be used for buybacks?

Dave Zinsner -- Senior Vice President and Chief Financial Officer

Yeah, good question, C.J. So, let's start with we're at about $9.7 billion of liquidity when you count the cash that we have on the balance sheet plus the $2.5 billion revolver we have. So, we're in, as you point out, very good shape relative to where our targeted liquidity would be. You saw a pretty healthy return of cash to shareholders in the first quarter, about 80% of our free cash flow went to shareholders in the form of the buyback. And really the rest went to further deleverage the balance sheet. There's not a ton of deleveraging that will go on through the rest of the year, quite honestly. And so I would expect us to continue to be good buyers of the stock, so to speak, through the next three quarters and contribute a high portion of our free cash flow in the form of a buyback.

CJ Muse -- Evercore -- Analyst

Very helpful. Thank you.

Operator

Thank you. And our next question will come from Mark Newman with Bernstein. Your line is now open.

Mark Newman -- Sanford C. Bernstein -- Analyst

Hi. Yeah, thanks for taking my question. First question, really, I'd like to ask on the supply adjustments you're making. You're taking down the guidance of both DRAM and NAND production and you mentioned about some of that being inventory but you also mentioned some of that being some production adjustments. Is it useful to understand a bit more about that? For example, is that a reduction of utilization? Is that no more capacity additions? What is that? Because some of your competitors have been pushing out some of their capacity additions and so it'd be useful to understand what Micron is doing here on the capacity adjustments to get to this slightly lower bit growth that you're forecasting for calendar '19?

Sanjay Mehrota -- President and Chief Executive Officer

So, certainly, we are taking actions, a range of actions, and we won't really get into any specifics here in terms of what actions we are taking to reduce our output. You earlier mentioned about inventory. Of course, we will carry inventory as necessary to manage the profitability. But the important thing to understand is that we are taking decisive actions in terms of reducing our production output, both in NAND as well as in DRAM. And that's the contributor to the $1.25 billion reduction in CapEx compared to our prior guidance.

And, of course, our intention here is to align our supply output in line with the industry demand trends. And we feel very good about the actions we have taken. In DRAM, we have pointed out that, compared to our prior expectations of 20% supply bit growth in calendar 2019, we have taken actions now to reduce our output to provide 15% supply output growth on a year-over-year basis. And in DRAM, as well, we have taken actions to adjust our output so that our shipments will match with our demand that we expect to be around 35% in 2019.

And I just want to also be very clear, as we have always said, that we are not adding any new wafer capacity. The CapEx that we discussed today, the lowered CapEx that we discussed, which, on a wafer equipment basis, is a reduction from fiscal year '18 CapEx, is all going toward technology transitions only. And that, of course, is the best way to achieve the ROI on those investments.

Mark Newman -- Sanford C. Bernstein -- Analyst

And so does that mean slower technology to migration or does it perhaps mean slightly lower utilization over a temporary period?

Sanjay Mehrota -- President and Chief Executive Officer

So, Mark, I'm not going to get into the specifics. The most important thing is we have managed our CapEx lower and we continue to take actions to manage our production output lower to align our supply with our demand expectations. And I think the effect of these actions will, in fact, some of these actions will start showing as early as this quarter.

Dave Zinsner -- Senior Vice President and Chief Financial Officer

And if you look at our gross margin guidance -- go ahead. Sorry, Mark.

Mark Newman -- Sanford C. Bernstein -- Analyst

You go ahead, Dave, first.

Dave Zinsner -- Senior Vice President and Chief Financial Officer

I was going to say, if you look at our gross margin guidance, it would reflect that we have a very good cost structure for our products.

Sanjay Mehrota -- President and Chief Executive Officer

And the reduction of the output that we are talking about, our cost structure will remain in very good shape even with that. And, in fact, in terms of costs, on a year-over-year basis, actually, our cost reductions, we believe both in DRAM and NAND, will be above the industry. Cost reduction will be better than the industry.

Mark Newman -- Sanford C. Bernstein -- Analyst

Great. And my follow-up question is on the demand. You talked about a little bit of an inventory correction among customers. Some of your competitors have talked a bit about that as well. But you seem to be really very confident that demand is going to come back second half of calendar '19, which also suggests that the inventory should have been burned up by then, the customers' inventory should have been used up mostly by then. It would just be helpful, do you have any data points to explain how you get that confidence that demand will come back? Is it perhaps, on the NAND side, more about demand elasticity? Is it on the DRAM side? Anything about the kind of magnitude of the inventory level that customers have today to give us some kind of sense that or confidence that that would have been used up within a couple of quarters, for example? That would be very helpful. Thanks.

Sanjay Mehrota -- President and Chief Executive Officer

So, first of all, I think we should realize that the end market demand trends, by and large, really remain quite healthy and our customers also are absolutely continuing to assure to us the optimism around the long-term demand trends. And as we noted in my remarks, in our fiscal second quarter, the bits for DRAM -- let me first talk about DRAM here. The bits for DRAM will be down on a year-over-year basis. And this needs to be compared with the long-term DRAM demand CAGR of 20%, high-teens to 20% range. So when, in FQ2, on a year-over-year basis, you have a reduction and you contrast it with the long-term demand trends of 20% kind of demand growth, then it tells you that during fiscal second quarter, a lot of the inventory adjustments will certainly be occurring. And that's why we say that it will take a couple of quarters for inventory adjustments to occur.

So, again, the point about year-over-year reduction in our DRAM shipments is an important point in understanding that the inventory adjustment by our customers is well under way. And all of this while the end market demand drivers of cloud, as you see from all the data, is absolutely continuing to be healthy. The end market demand drivers, in terms of average capacity increases flash in smartphones, as well as DRAM content in smartphones, driven by AI and machine learning, continues to be on the upward trend. And, of course, applications like automotive and industrial, IoT, more AI, and more machine learning, all of these are continuing to drive the demand trends to a need for more storage and more memory. And we laid out some of these opportunities at our Investor Day and all of those opportunities very much stay intact and, at the end market level, continue to be vibrant.

So, I think these couple of points, that the November quarter itself was, in terms of overall shipment, was below seasonal, as well as the first quarter, on a year-over-year basis, really showing the reduction points to inventory adjustments are well under way. And, of course, you have to look at this in the backdrop that the output in the industry is coming down as well. We have announced our decisive actions here today and we have provided the outlook in terms of our output growth in calendar year '19, both for NAND as well as DRAM. So, these -- and then, as I said before, that second half of the year tends to be a seasonally stronger part, in terms of demand, compared to the first half. So, these all are definitely pointing to our confidence and built upon inputs from our customers, in terms of second half of the year being stronger than the first half of the year, in terms of demand trends and the industry fundamentals as well.

And let me just point out one more thing here. When you look at industry, compared to the last cycles, really the CapEx curves are happening at a much, much earlier level in the cycle. And really, in terms of happening even at much higher levels of profitability than ever in the past. So all this, overall, really bodes well for the long-term fundamentals of the industry as well as, certainly, for Micron.

Mark Newman -- Sanford C. Bernstein -- Analyst

All right. Great. Thank you very much. Appreciate that.

Operator

Thank you. And our next question will come from the line of Aaron Rakers with Wells Fargo. Your line is now open.

Aaron Rakers -- Wells Fargo Securities -- Analyst

Yeah. Thank you for taking the questions. I was wondering if I could build on that last comment. You've talked a lot about your own plans, in terms of curtailing your capacity expansion this year, but given that you're in an off-calendar quarter, I'm just curious of how you would characterize maybe the competitive landscape. Maybe what you've seen change over the last month and a half or so relative to some of your competitors, in the context of both DRAM and NAND. And I have a follow-up.

Sanjay Mehrota -- President and Chief Executive Officer

I think, in that regard, you know as much as I do. And over the course of the last couple of months, there have been reductions that have been discussed in the industry. The reductions that you have heard about that manufacturers have talked about but also several analysts have indicated those as well. And, of course, the near-term outlook has also, as we said, continued to weaken through the course of our FQ1 timeframe. And even since our FQ2 have started, those demand-weakening trends have continued as well. So, I think that this is -- the information that is out there is what we are using. But we can only talk about ourselves and we certainly have taken here decisive actions in terms of managing our output growth in line with our demand expectations.

Aaron Rakers -- Wells Fargo Securities -- Analyst

Okay. And then as a quick follow-up, just thinking about your product portfolio, particularly around the enterprise SSD market, I'm curious. It sounds like, possibly, you're seeing maybe even a quicker ramp toward NVMe than what you previously have seen. So, I mean, is there a way to kind of quantify how much of maybe the enterprise SSD market is kind of moving away from you until you get your products into the market in the latter part of this calendar year or calendar '19?

Sanjay Mehrota -- President and Chief Executive Officer

Certainly, as we have been speaking for a while, the transition from SATA to NVMe is taking place at a fast pace in enterprise as well as in cloud applications. And we have been focused on developing our own products and that's why we have said that, in calendar year -- our fiscal year 2019, as we bring out our new NVMe products to the market, our 2019 calendar year ends up being more a year of transition for us. But there is no question that the market certainly is moving from SATA to NVMe applications across the board.

And we have just introduced some of our early NVMe products for consumer SSDs and I talked about how we have introduced NVMe product for automotive applications as well. And during the course of calendar 2019, we'll first be bringing out client NVMe products to the market and then later in the year, we bring enterprise and cloud NVMe SSDs. And that's why we look at calendar year 2020 will be the one timeframe when we start gaining share again in our SSD market.

Aaron Rakers -- Wells Fargo Securities -- Analyst

Okay. Thank you.

Operator

Thank you. And our next question will come from the line of Romit Shah with Nomura. Your line is now open.

Romit Shah -- Nomura Instinet -- Analyst

Thank you. Sanjay, I heard you indicate that you expect above-average cost declines but I guess my question is aren't the actions that you've announced today probably more of a hit to cost per bit in 2020 versus 2019? How do we think about that?

Sanjay Mehrota -- President and Chief Executive Officer

I think what we have shown you today is that we are able to take decisive actions and we are able to take them fast. I mean, just remember that FQ4 was a record year for the company and FQ1 is when we first saw signs of inventory adjustment. During the course of FQ1, we have been able to react, in terms of cutting down our CapEx, as well as manage our output growth. So, the point is we can react fast to the changes that are needed in the marketplace. And we remain -- I mean, this is something we review very, very closely on an ongoing basis, very focused on making sure that we are maximizing the long-term profitability and long-term growth opportunity for Micron.

So this is something that, in terms of cost, we feel very good about our position for 2019. And going beyond that, we, of course, continue to make very good progress on our technology nodes. As I discussed with you, our technology on 1Z is progressing well. We feel good about that roadmap and continue to make good progress on our NAND roadmap as well. And that will all position us well for 2019 as well as for 2020 timeframe. And I just want to point out that our focus also is on shifting our portfolio to high-value solutions and those will also strengthen our profitability profile.

Romit Shah -- Nomura Instinet -- Analyst

And I guess as my follow-up, on CapEx, you're cutting your forecast for the year but CapEx is still up on a year-on-year basis. I'm curious, if this downturn ends up being longer than any of us sort of anticipate, is there leverage to reduce CapEx any further from current levels?

Sanjay Mehrota -- President and Chief Executive Officer

So, I will just touch on CapEx. On your previous question on cost, I also wanted to point out that, on the cost side, we are making tremendous progress on the back-end, assembly and test cost reductions, as well as managing and transforming our supply chain operations, which will give us significant cost benefits as well. so, all in all, 2019 and beyond, feel very good about our technology roadmap, manufacturing roadmap capability, as well as overall cost capabilities.

In terms of on the CapEx side, just keep in mind that we have said that, with the adjustments that we just have made, our wafer equipment CapEx actually is coming down in fiscal year '19 versus fiscal year '18. And as we have discussed before, Micron over the last few years has significantly underinvested in clean room shell CapEx in the facilities and the buildings that are needed to really implement ongoing future technology transitions.

And a big part of our CapEx, as we had shared with you in the past, actually is going toward buildings and facilities, clean room that will be needed for future technology transitions as well. All of that CapEx does not contribute to bit growth. And, similarly, we have a significant increase in our CapEx in fiscal year '19 over fiscal year '18 on back-end tests and assembly operations as well. And that is, again, intended to reduce costs and not -- it doesn't go toward any bit growth.

And we have the flexibility, as we have shown already, in terms of managing CapEx. We will continue to look at this carefully and if any factors require us to change our CapEx outlook again, we will absolutely address it in a timely and prudent fashion. We always continue to evaluate market environment, as well as our own status of technology transitions, production requirements, and we are making real-time adjustments as needed.

Romit Shah -- Nomura Instinet -- Analyst

I mean, it seems like the actions you guys are taking are very prudent but the part that's confusing for me is, if you're slowing your process migration, then there should be some impact to cost per bit. And I guess I'm just not quite -- I just don't quite understand what that impact is.

Sanjay Mehrota -- President and Chief Executive Officer

Again, in terms of cost per bit, there are a lot of details that have to be looked at. We are not going to get into all of those details here. Key message here is that we are bringing our production output in line with our demand expectations. Second, we feel very good about our technology position and our cost position and we'll continue to do very well in this regard. Cost position, of course, includes wafer level cost position but also includes the benefits of assembly and test cost improvements that we are making. And third is we absolutely stay focused on our high-value solutions strategy and we are executing well in this area. We talked about how, in mobile, even in a market environment of significant NAND oversupply, we actually have delivered strong gains in our mobile high-value solutions portfolio as well.

Romit Shah -- Nomura Instinet -- Analyst

All right. Thank you.

Operator

Thank you. Ladies and gentlemen, this concludes our question-and-answer session for today. Thank you for your participation on today's conference. This does conclude our program and we may all disconnect. Everybody, have a wonderful day.

Duration: 63 minutes

Call participants:

Farhan Ahmad -- Head of Investor Relations

Sanjay Mehrota -- President and Chief Executive Officer

Dave Zinsner -- Senior Vice President and Chief Financial Officer

Timothy Arcuri -- UBS Securities -- Analyst

John Pitzer -- Credit Suisse -- Analyst

CJ Muse -- Evercore -- Analyst

Mark Newman -- Sanford C. Bernstein -- Analyst

Aaron Rakers -- Wells Fargo Securities -- Analyst

Romit Shah -- Nomura Instinet -- Analyst

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