Markets treating tariffs as a switch
Some investors are behaving as if U.S. tariff policy is a flip that could move markets overnight. A market note argued that suspending tariffs could itself spark a stock‑market rally, underlining how much current valuations depend on political discretion rather than underlying earnings. (theglobeandmail.com)
Stocks have repeatedly jumped or slumped on tariff headlines alone, turning White House trade policy into a near-instant market trigger. (bloomberg.com) On April 9, 2025, President Donald Trump announced a 90-day pause on higher tariffs for many countries and cut those rates to 10% during negotiations, while raising tariffs on China to 125%. The S&P 500 rose 9.5% that day, its biggest one-day gain since 2008, and the Nasdaq 100 jumped 12%. (whitehouse.gov; reuters.com) Two days earlier, on April 7, 2025, stocks briefly surged on a false report that the administration might pause tariffs for 90 days. The White House called the report “fake news,” but the episode showed how quickly traders were pricing in a tariff reversal. (bloomberg.com; politifact.com) A tariff works like a tax on imports: it can raise costs for companies that buy goods from abroad, and those companies can absorb the hit, pass it on to customers, or both. Investors react because each option can squeeze profit margins, lift prices, or slow demand. (blackrock.com) That is why a suspension can move stocks even before any company reports better earnings. Traders are betting first on lower costs, less inflation pressure and fewer odds of a growth slowdown. (finance.yahoo.com; federalreserve.gov) Federal Reserve Chair Jerome Powell said on March 18, 2026, that recent inflation in goods “has been boosted by the effects of tariffs.” In the same press conference, he said total personal consumption expenditures prices rose 2.8% over the 12 months through February, with core personal consumption expenditures at 3.0%. (federalreserve.gov) That link to inflation matters for interest rates as well as trade. If tariffs keep prices higher, the Federal Reserve has less room to cut rates; if tariffs are eased, markets can start betting again on cheaper borrowing. (federalreserve.gov; finance.yahoo.com) Not everyone reads a tariff pause as a durable fix. BlackRock said in a 2025 market note that trade policy would “continue to evolve,” and Franklin Templeton said tariff announcements had caused historic volatility even after markets recovered. (blackrock.com; franklintempleton.com) The market message has been simple: tariffs are being traded less like a slow-moving policy debate and more like an on-off switch. As long as that remains true, a pause can lift stocks in a day, and a threat can erase those gains just as fast. (bloomberg.com; bloomberg.com)
