Why Are Stock Valuations So High Right Now?

If you look at stock prices right now, you'd be excused for thinking they're high. That's because they are. The bigger question is: Why are they so high?

You can get a sense for just how pricey stocks are by looking at the Case-Shiller cyclically adjusted price-to-earnings ratio. This is a rolling 10-year average of the price-to-earnings ratio on the S&P 500.

A chart of the Case-Shiller cyclically adjusted price-to-earnings ratio.
A chart of the Case-Shiller cyclically adjusted price-to-earnings ratio.

Image source: Robert Shiller. Chart by author.

What's fueling stocks right now?

Stocks have been higher than they are right now only twice in the past. The first time was in 1929 and the second time was in 1999, both of which were followed by steep corrections.

This doesn't necessarily mean we're in bubble territory, as there are good reasons stock prices are historically high. Interest rates are low, for example, which makes stocks more attractive than low-yielding bonds, thereby causing money to flood from the fixed-income markets into the stock market.

There have also been a number of important catalysts over the past year and a half that have pushed stocks higher. The presidential election was the big one, as then-candidate Donald Trump campaigned on a promise to cut the corporate tax rate from 35% down to 15%.

A businessman tracing his finger on a chart.
A businessman tracing his finger on a chart.

Image source: Getty Images.

Like lower interest rates, low taxes contribute directly to stock valuations. That's because stocks tend to be valued as a multiple of earnings. Therefore, because earnings will improve if taxes are cut, stock valuations were primed to climb, as they obviously have.

And it isn't just stock valuations that are high. Farmland is also selling at a historically dear price. As is commercial real estate. And, of course, bitcoin prices have gone through the roof this year.

A chart of farmland prices.
A chart of farmland prices.

Data source: U.S. Department of Agriculture. Chart by author.

This seems to dim the prospects for future returns. If valuations today are high as a result of low interest rates, doesn't that mean they'll drop when interest rates climb?

That is a reasonable concern that investors should keep in mind when they buy stocks today. In my opinion, this would lead investors in at least two directions.

Banks and interest rates

The first direction is to invest in companies that will benefit from higher interest rates. Banks offer a case in point.

When a bank makes a loan, it's essentially selling money. The price at which it does so is the interest rate. So as rates rise, so, too, will the price of money. And as the price of money rises, so too should bank revenues.

In JPMorgan Chase's (NYSE: JPM) case, the nation's biggest bank by assets estimates that a 100-basis-point increase in both short- and long-term rates will translate into $1.9 billion in added net interest income, a component of revenue. "The firm's sensitivity to rates is largely a result of assets repricing at a faster pace than deposits," notes JPMorgan Chase's latest quarterly regulatory filing.