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S&P 500 Bull Market Risk: Fed Cycle Fear Not Single Hike

indices • 11 September 2026

S&P 500 Bull Market Risk: Fed Cycle Fear Not Single Hike

The S&P 500 bull market faces renewed scrutiny as rate risk reasserts itself, though neither a recession nor a policy-induced break appears imminent. Historical patterns suggest equity peaks typically coincide with cumulative tightening cycles rather than isolated rate…

The S&P 500 bull market faces renewed scrutiny as rate risk reasserts itself, though neither a recession nor a policy-induced break appears imminent. Historical patterns suggest equity peaks typically coincide with cumulative tightening cycles rather than isolated rate moves.

The Cycle Versus the Hike Analysts note that post-1980 bull markets have ended after the Federal Reserve delivered a median of 325 basis points of cumulative tightening, not after the first hike. With the current cycle at roughly 525 basis points, the focus has shifted from the terminal rate to the duration of restriction. Market participants may monitor whether the "higher for longer" narrative sustains financial conditions tight enough to impair earnings momentum.

Earnings Resilience Under Scrutiny Research indicates that S&P 500 operating margins have compressed from 13.1% in Q4 2021 to approximately 11.8% in recent quarters, even as revenue growth slowed. The development could influence forward estimates if labor costs remain sticky and pricing power fades. Historical data suggests that when year-over-year earnings growth turns negative outside of recessions, the index has averaged a 12% drawdown over the subsequent six months.

Key Factors to Watch - The spread between 2-year and 10-year Treasury yields as a leading indicator of growth expectations - Corporate guidance revisions during Q3 earnings season for evidence of demand destruction - The Fed's Senior Loan Officer Opinion Survey for signs of credit tightening transmitting to the real economy

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Research-only market commentary. Not financial advice.