Key TakeawaysU.S. stocks experienced their steepest one-day decline since April, with the S&P 500 falling 2.7%, the Dow Jones Industrial Average dropping 1.9%, and the Nasdaq Composite sliding 3.6%, following President Trump's threat of "massive" tariffs on China.The cryptocurrency market suffered its largest single-day liquidation in history, wiping out over $19 billion in leveraged positions, directly triggered by escalating U.S.-China trade tensions.Persistent economic uncertainty is exacerbated by an on ...