The U.S. economy has undergone a fundamental structural shift where supply constraints are now the dominant threat, prompting a stark warning from the Federal Reserve Bank of San Francisco that policymakers may soon grapple with “elevated inflation” alongside weakened economic growth.
A Historic Shift in Financial Markets
For the first time in decades, the relationship between equities and government debt has abruptly reversed. According to a newly released Economic Letter by San Francisco Fed researchers Thomas Mertens and Wesley Wasserburger, the “stock-bond correlation recently flipped, suggesting that the perceived source of risk to the economy has shifted towards supply shocks.”
During much of the 2000s and 2010s, economic risks largely stemmed from the demand side, leading to a positive co-movement between stocks and bonds. However, recent supply-side disruptions—such as the COVID-19 pandemic, geopolitical conflicts in Europe and the Middle East, and expanded tariff policies—pushed this correlation into negative territory in the early 2020s.
In a supply-driven environment, scarce goods weaken economic activity and lower stock valuations, while simultaneously raising inflation and pushing bond yields higher.
Energy Markets Confirm Future Risks
This macroeconomic transition is heavily corroborated by behavior in global energy markets. The researchers noted that the correlation between the stock market and oil futures prices broadly mirrors the stock-bond reversal, switching to negative.
Furthermore, how financial markets price uncertainty has changed dramatically. Historically, increased uncertainty in the oil market (measured by the Oil VIX) coincided with lower oil prices. However, starting in 2025, this correlation spiked and turned positive, indicating that “negative supply shocks and the uncertainty around them are driving up oil prices.”
Ultimately, these persistent supply-driven dynamics suggest a challenging new reality. The authors conclude that central bankers may face more frequent supply shocks and an “uncomfortable combination of elevated inflation with softer economic activity in the near term.”
How Have Markets Performed In 2026?
The S&P 500 index has advanced 13.04% year-to-date. Similarly, the Nasdaq Composite index was up 14.50%, and the Dow Jones gained 11.56% YTD. Meanwhile, Bret Crude Oil futures have gained 26.12% over the last six months but it was down 16.01% in the last three months. WTI Crude Oil futures, on the other hand, rose by 27.12% over six months and declined by 16.45% over the last three months.
The SPDR S&P 500 ETF Trust (NYSE:SPY) and Invesco QQQ Trust ETF (NASDAQ:QQQ), which track the S&P 500 and Nasdaq 100, respectively, were trading higher in premarket on Tuesday. The SPY was up by 0.13% at $774.05, while the QQQ advanced by 0.28% to $722.91.
Meanwhile, the Dow tracker, State Street SPDR Dow Jones Industrial Average ETF Trust (NYSE:DIA), was 0.054% higher at $539.28 in premarket trading.
Disclaimer: This content was partially produced with the help of AI tools and was reviewed and published by Benzinga editors.
Image via Shutterstock
Login to comment