If you’ve been reading financial news lately, you’ve probably seen headlines fretting about stock market valuations being “lofty,” “extended,” or in a “bubble.” A lot of that chatter is fueled by a metric known as the Shiller CAPE Ratio.
We thought it would be helpful to dive into what this is, what it’s telling us now, and—most importantly—what it actually means for your portfolio.
The CAPE Ratio: The Market's Price Tag
First, a quick 101. The Shiller CAPE Ratio (Cyclically Adjusted Price-to-Earnings) is like a super-sized P/E ratio. Instead of looking at earnings from just the last year, it averages inflation-adjusted earnings from the last ten years. This smooths out the short-term booms and busts of the business cycle, giving us a clearer picture of whether the stock market is fairly valued historically.
Think of it as checking if an investment property is overpriced not just based on this year's income, but on the average income of the last decade.
The Current View: We're in Rarefied Air
Looking at the chart, it’s clear we’re at an elevated level. The CAPE ratio is currently hovering in a zone that has only been surpassed twice in history: the dot-com bubble of 1999-2000 and the 1929 peak before the Great Depression.
That fact alone can (and should) make any investor pause. High valuations historically suggest lower long-term returns are ahead. It’s a signal that stocks are expensive relative to their underlying earnings power.
So, Should We Head for the Exits?
Not so fast. While the CAPE ratio is a fantastic tool for setting long-term expectations, it’s a terrible tool for market timing. Here’s why we’re not pushing the panic button:
"This Time Is Different" Can Be a Dangerous Phrase, But... There are structural reasons why CAPE has spent more time at higher levels over the past 30 years. Changes in accounting rules (how earnings are calculated), the rise of globally dominant, high-margin tech companies, and persistently low interest rates have all arguably justified a higher "new normal" for valuations.
It's a Condition, Not a Catalyst. A high CAPE ratio tells us the market is vulnerable to a downturn if a negative catalyst appears (like a recession or a spike in inflation). But it doesn’t predict when that will happen. The market can stay "expensive" for years, and selling based on CAPE alone could mean missing out on significant gains.
Context is Everything. The CAPE ratio is a great snapshot, but it's not the whole movie. We’re constantly analyzing other factors like corporate profit trends, the interest rate environment, and the strength of the consumer to get the full picture.
Our Takeaway: A Call for Realism and Discipline
Our job isn’t to predict the unpredictable but to prepare for it. Here’s how we’re thinking about it and preparing the ACGM Total Portfolio Solutions Suite:
Manage Expectations: This is not a environment to expect the 10%+ annual returns for the U.S. stock market of the last decade. We should be mentally prepared for a period of more modest returns and higher volatility.
Stay Disciplined & Diversified: Now is the worst possible time to abandon a thoughtfully constructed plan. Diversification across asset classes (particularly overweights to non-U.S. developed and emerging stock markets and certain types of bonds) is crucial. When one part of the global market zigs, another zags.
See Volatility as an Opportunity: If markets do become rocky, we’ll see it not as a reason to fear, but as a potential opportunity to rebalance and buy quality assets at better prices.
The high CAPE ratio is a yellow light, not a red one. It tells us to proceed with caution, not to stop altogether.