Tips From an Expert Stock Picker

After months of high-correlation, returns are diverging, highlighting the difference between stocks with great fundamentals and everything else

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InvestorPlace - Stock Market News, Stock Advice & Trading Tips

***”It’s only when the tide goes out that you learn who has been swimming naked

That folksy quote comes from investing legend, Warren Buffett … and it’s a suitable description for a dynamic that’s taking place in today’s market.

As you likely remember, late summer/early fall was a fearful time. Investors faced a laundry list of concerns — the inverted yield curve, disappointing U.S. manufacturing data, a slowdown in corporate stock buybacks, poor technicals as stocks had broken key support levels …

Fear was spreading. And in times of fear, investors tend to herd into the same defensive positions. Basically, everyone is running for cover since significant macro concerns overhang the entire market.

Now, compare that to when conditions are more optimistic …

When no massive storm clouds threaten the entire market, investors feel free to turn their focus to the unique situation of each individual stock. Obviously, some stocks will be better positioned for gains than others.

In this type of market, accomplished stock-pickers are able identify the truly excellent investments from the average “ho-hum” investments. Some stocks begin to stand out as superior, and then pull ahead from the pack.

In other words, the tide goes out … and that’s when we see the real condition of the various “swimmers.”

The technical way we measure this difference is through stock return correlation.

A correlation of 1 would mean that stocks are moving together perfectly. A zero correlation would show no relationship at all between stock returns. A correlation of -1 would mean stock movements are perfectly opposite.

***After months of trading together, many big U.S. stocks are diverging, and it’s pointing toward one thing — it’s becoming a stock-picker’s market

Throughout November, the average three-month rolling correlation among stocks in the S&P 500 has been falling.

Among individual stocks, correlation dropped to 0.23 last Friday. That’s down from 0.42 on Oct. 30, and below the five-year average of 0.30.