For most of the past three and a half years, the stock market has been on a remarkable upward trajectory. The Dow Jones Industrial Average recently reached a new record high, while the S&P 500 and Nasdaq Composite achieved all-time highs earlier in June.
A few key factors driving this impressive trend include:
-
The advancement of artificial intelligence (AI)
-
Corporate profits surpassing expectations
-
Investor enthusiasm following stock splits
-
Excitement surrounding major initial public offerings
-
Record buybacks among S&P 500 companies anticipated in 2025
Although history shows that major stock indexes often see long-lasting uptrends, it’s important to remember that bull markets don’t continue indefinitely. While correlations exist, they can’t accurately predict events on Wall Street; some historical patterns are often better indicators than others.
Right now, the market is reflecting a situation that has only popped up once since January 1871, which is concerning for many investors.
Investors don’t see this every day…
There are always challenges that could disrupt the stock market at any moment. Rising interest rates, for instance, could impact AI data center construction. Furthermore, margin balances have surged, and a spike in risk-taking isn’t generally favorable.
But perhaps the most alarming sign right now is stock valuations.
Valuing public companies isn’t straightforward; what one investor sees as overpriced, another might find a bargain. This subjective nature of valuation makes forecasting short-term market shifts quite tricky.
Many investors lean on established metrics like the price-to-earnings (P/E) ratio to assess value. This ratio, calculated by dividing a stock’s price by its earnings per share over the last year, can offer a quick valuation of mature firms but often fails to accurately assess growth companies or perform well in downturns when earnings can dip.
This is where the Shiller P/E ratio comes into play. It adjusts for inflation and considers average earnings over the last decade, making it more resilient during economic downturns.
Though introduced only in the late 1980s, the Shiller P/E ratio has been evaluated back to January 1871. Surprisingly, it has averaged around 17.4 over the past 155 years. As of June’s end, the Shiller P/E stood at a staggering 41.72, about 140% above its historical norm. It’s noteworthy how close it is to its all-time high, causing a good deal of concern among analysts.
Interestingly, Shiller’s P/E ratio has exceeded 40 only three times in 155 years. One of these instances occurred briefly in early January 2022. In contrast, the Shiller P/E has crossed the 41 threshold only twice in history.
The most significant market rally historically was just before the dot-com bubble burst. In December 1999, the CAPE ratio peaked at 44.19 during the internet frenzy. The present bull market is also noteworthy, nearing highs at 42.84.
While the Shiller P/E can’t precisely signal when market conditions will worsen, it has effectively indicated when substantial declines in stock valuations are likely. For example, after the dot-com bubble burst, the S&P 500 and Nasdaq Composite dropped by 49% and 78%, respectively.
The highest historical measurements are not the sole warning signs. The Shiller P/E has hit 30 on six occasions, and in the last five occurrences (excluding the current one), major indexes fell by over 20% each time.
If we look at history, it seems likely we may be on the brink of another significant price decline.
History overwhelmingly favors patient optimists
Market corrections and crashes can be daunting, but history may serve as a reassuring ally for investors. Historically, overvaluation often accompanies significant technological advancements (like AI), yet a long-standing trend indicates that optimism and pessimism can diverge dramatically on Wall Street.
Recent insights from analysts at Bespoke Investment Group highlighted trading behaviors in bull and bear markets dating back to the Great Depression. They detailed performance from 27 cycles since 1929, showing that bear markets tend to last an average of just 286 calendar days—approximately 9.5 months—and have never exceeded 630 days.
In contrast, a typical bull market lasts nearly 1,023 days, or about 3.6 times longer than the average bear market. Notably, over half of the bull markets in the study surpassed the duration of the longest bear market.
Supporting this perspective, Crestmont Research detailed 20-year total returns, including dividends, across various S&P 500 indexes since the early 20th century. Their findings revealed 107 unique 20-year periods, all producing positive returns. This means that, hypothetically, if you held onto an S&P 500 index for two decades, you’d have consistently seen gains despite various challenges.
No matter how the Shiller P/E impacts short-term trends, the evidence is clear: patient optimists are well-positioned to thrive on Wall Street.
Should you buy S&P 500 stocks now?
If you’re thinking about diving into S&P 500 stocks, here are a few things to keep in mind:
Our analysts have highlighted some top picks that, based on their assessments, aren’t in the S&P 500 but show strong potential for long-term growth.
For instance, Netflix and Nvidia have been recommended in the past; investing at the right time in these companies would have led to substantial returns. Their performance continues to be a compelling reason why people pay attention to their insights.
In summary, though stocks can seem attractive now, it’s wise to consider various factors, especially given the market’s recent trends and historical context.
