Are Higher Rates a “Real” Problem?

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Key takeaways

  • Strong equity market starts have historically tended to carry on through year-end, and today’s higher yields appear less threatening amid a resilient economic and earnings backdrop and ClearBridge US Recession Dashboard flashing a green, expansionary signal.
  • The recent rise in the 10-year Treasury yield has been driven primarily by higher real rates, not a surge in inflation expectations or term premium, suggesting this is not a fiscal or credibility shock.
  • With nominal growth still solid and inflation expectations well anchored, a pause or decline in yields could ease financial conditions and help support the next leg higher in risk assets.

Some investors are questioning how much further this year’s rally can run with the S&P 500 Index up 12.3% through the first eight months of the year. Encouragingly, history suggests that strong starts tend to persist; when the S&P 500 has gained more than 10% through August it has advanced from September through December in 25 of 28 instances, an 89% positive hit rate. These periods produced an average rest-of-year return of approximately 5.3%, well above the 3.6% average for all observations since 1950.

Exhibit 1: Start Strong, End Strong

Bar chart comparing average S&P 500 returns for two periods. For January-August, periods with gains of 10% or more show an average full-year return of approximately 18%, versus about 5.5% for all periods since 1950. For September-December, the current period shows an average return of about 5%, compared with roughly 3.5% for all periods. A label above the current period notes a hit rate of 89.3%. The y-axis ranges from 0% to 20% and is labeled “Average S&P 500 Return.” Blue bars represent the highlighted periods and gray bars represent all periods (1950-2025).

This should give investors little reason for pessimism, although two of the three negative periods (1979 and 1987) were marked by sharp increases in long-term interest rates that contributed to difficult trading conditions for US equities. That historical caveat feels especially relevant today, with the 10-year Treasury yield up more than 80 bps from its late-February low and nearing 5%. As a result, concerns have lingered that the bond market could disrupt what is typically a strong final stretch of the year for stocks.

See more: What’s Driving the Rise in Global Bond Yields?

The persistence of higher long-end yields is particularly notable because both the US Citi Economic Surprise Index and the US Citi Inflation Surprise Index rolled over at the end of June, i.e., data releases in aggregate are no longer beating expectations as frequently. Ordinarily, weaker economic and inflation data versus expectations (surprises) push yields lower, not higher, meaning the recent divergence warrants a closer look.