US stocks shake in twitchy trading as bonds show more stress following tariff escalations

NEW YORK (AP) — The U.S. stock market is shaking through twitchy trading Wednesday after most other markets tumbled as President Donald Trump's trade war keeps escalating. The S&P 500 was 0.3% higher in morning trading after quivering sharply at the start of trading. The index at the center of many 401(k) accounts went from a loss of 0.5% to a gain of 1.4% and back down. The Dow Jones Industrial Average was down 34 points, or 0.1%, as of 10:15 a.m. Eastern time, and the Nasdaq composite was 1.1% higher. Huge swings have become routine for financial markets worldwide…