It's easy to get caught up in the daily swings of the market. As Ferris Bueller (nearly) said, “The market moves pretty fast. If you don’t stop and look around once in a while, you could miss it.” That reminder feels especially relevant right now, with headlines dominated by oil prices, earnings surprises, and central bank moves.
But for long-term investors, the noise of any given week matters far less than the big picture. So let's step back and check in on the two things that really drive your portfolio: economic fundamentals and stock valuations. Here's a no-nonsense guide to judging where things stand today.
Why price-to-earnings isn't the whole story
When investors talk about whether stocks are expensive, they usually start with the price-to-earnings (P/E) ratio — the price of a share divided by the company's earnings per share. A high P/E suggests investors are paying a premium for each dollar of profit, often because they expect strong growth ahead.
But looking at share prices relative to earnings only gets you so far. For a fuller picture, you need to bring a couple of economic heavyweights into the mix: bond yields and inflation. That's where the excess CAPE yield comes in.
The CAPE ratio (cyclically adjusted price-to-earnings) smooths out earnings over a 10-year period to even out the ups and downs of the business cycle. The excess CAPE yield takes that one step further: it subtracts the inflation-adjusted (or “real”) yield on long-term Treasury bonds from the earnings yield implied by CAPE. In plain terms, it asks: after accounting for inflation, how much extra return are stocks offering compared with safe government bonds?
A surprisingly balanced signal
Right now, that signal is surprisingly balanced. In other words, the gap between what stocks are expected to earn and what bonds are paying, after inflation, is neither unusually wide nor unusually narrow. Historically, a very high excess CAPE yield has meant stocks were cheap relative to bonds, while a very low or negative reading has signaled that bonds offered better value.
Today's balance suggests that, despite headlines about lofty valuations, stocks aren't obviously overpriced once you factor in the competition from bonds. That's a meaningful counterpoint to the fear that the market is in a bubble. It also reflects the reality that Treasury yields have climbed in recent months — mortgage rates have hit a 14-month high as bond yields rose — which makes the fixed-income alternative more attractive than it was a few years ago.
But balance doesn't mean certainty. The excess CAPE yield is a long-term indicator, not a timing tool. It tells you about the relative attractiveness of stocks versus bonds over the next decade, not whether the market will rise or fall next week.
What it means for your portfolio
For everyday investors, the key takeaway is that valuation signals like the excess CAPE yield are best used to set expectations, not to make quick trades. A balanced reading suggests that future stock returns may be more moderate than the outsized gains of the past decade, but it doesn't mean you should abandon equities.
Instead, consider how this fits with your own time horizon and risk tolerance. If you're decades from retirement, a balanced valuation backdrop is no reason to change course. If you're nearing retirement, it might be a reminder to check that your asset allocation still matches your need for income and stability.
It's also worth remembering that the excess CAPE yield is just one lens. Other measures, like the forward P/E or the Buffett Indicator (total market cap relative to GDP), can tell different stories. And in the short term, markets are driven by momentum, sentiment, and surprises — like stocks slipping as oil climbs or a company beating estimates but still seeing its stock drop.
The bigger picture
Ultimately, the excess CAPE yield is a reminder that stock valuations don't exist in a vacuum. They're always relative to the alternatives. When bond yields are low, stocks can look expensive even at high P/Es. When bond yields rise, as they have recently, the bar for stocks gets higher — but the current balance suggests the bar hasn't been set impossibly high.
Investors should also keep an eye on inflation, which erodes the real value of both stock earnings and bond coupons. If inflation stays contained, the current balance could persist. If it reaccelerates, the calculus could shift quickly.
As always, the best approach is to stay informed, stay diversified, and avoid making drastic changes based on any single indicator. The market will keep moving fast — but with a clear framework for judging valuations, you won't miss what really matters.
