Insights from Javier Estrada’s Research on Market Returns

Javier Estrada’s recent study, titled “Expected price earnings ratio when bullish,” delves into stock return mathematics, urging caution during today’s market boom. By examining over 150 years of U.S. market data from 1872 to 2024, Estrada breaks down annual returns into key components: dividend yield, earnings growth, and fluctuations in price-to-earnings (P/E) ratios. His conclusions suggest that periods of consistently strong profits tend to be short-lived, particularly following vigorous bull markets.

Historical Context of Bull Markets

Estrada notes that rapid earnings growth and rising P/E ratios seldom occur simultaneously—there’s a notable negative correlation over a decade (around -0.5). Essentially, when profits surge, investors usually stop inflating valuations, and the opposite holds true, too. This dynamic becomes critical when markets hit extreme valuations, as seen in the late 1990s and the current environment.

His research draws parallels between today’s market—characterized by high P/E ratios, low dividend yields, and investor optimism from recent earnings—and the situation in 1999. Back then, while the S&P 500 saw remarkable stock price growth, valuations became unsustainable. This eventually led to a disheartening annual return of just 0.1% over the next decade, after adjusting for inflation.

The Challenge of Sustaining High Returns

According to Estrada, anticipating high future returns during market booms requires either exceptionally rapid earnings growth, significant P/E ratio expansions, or a combination of both. However, historical trends reveal that achieving such conditions concurrently is quite rare. It seems increasingly unrealistic to hold those expectations now. With fundamental factors like earnings and dividends tending to revert to long-term averages, future returns could diminish significantly. Estrada estimates they might be as low as 0.4% annually within the next decade.

Investor Takeaways: Focus on Valuation

What should retail investors take from this? Estrada advocates for a reassessment of expectations.

• Prepare for reduced stock market returns over the next ten years, especially if mean reversion becomes a reality.
• Be wary of recency bias; the tendency to think that strong recent performance will persist indefinitely can be misleading.
• Emphasize fundamental evaluations like dividend yield, earnings growth, and P/E ratios instead of chasing recent performance.
• Maybe consider a more conservative equity allocation or diversify into other risk assets like reinsurance, private credit, infrastructure, and real estate. A long-short market-neutral strategy might also be worth exploring.

Estrada’s extensive analysis of price-to-earnings ratios carries a strong message: as the market rises, the likelihood of all return-driving factors staying positive declines. The negative correlation between earnings growth and P/E expansion implies that both driving forces won’t likely push returns together over the long haul. The current market with lofty stock prices and minimal yields poses a tough challenge for sustaining recent gains. It would take an unusual and rare combination of buoyant earnings and sharply rising valuations to sustain optimistic forecasts.

Estrada suggests that investors should focus on valuation and brace their portfolios for more modest returns instead of trying to guess timing. Mean reversion, the tendency of markets to revert to historical averages, stands out as a key feature of the stock landscape. Those who absorb these insights will be better equipped to navigate the inevitable market shifts.

In essence, the takeaway for investors is straightforward: align expectations with historical trends rather than mere optimism. Strong bull markets are succeeded by phases of moderate or even negative returns. Preparing for such transitions exemplifies sound discipline.