UBS downgrades the U.S. stock market. Here's what has the investment bank worried

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UBS’ top equity strategist dialed back his view on U.S. stocks, citing mounting risks from a weakening dollar, stretched valuations and policy turbulence in Washington.

Andrew Garthwaite, head of global equity strategy at the investment bank, downgraded American equities to “benchmark” in a fully invested global equity portfolio, arguing that the factors that powered years of outperformance are starting to fade.

The dollar risk is a central concern, Garthwaite wrote. UBS forecasts the euro climbing to $1.22 by the end of the first quarter and sees “asymmetric structural downside risks” to the greenback. Historically, when the dollar’s trade-weighted index falls 10%, U.S. equities underperform by roughly 4% in unhedged terms, according to the bank.

Foreign markets are trouncing the U.S. this year as a weaker dollar and cheaper valuations draw capital overseas. The MSCI World ex-US index has gained about 8% in 2026, compared with the little changed performance for the S&P 500