US stock markets today: US stocks decline with tech leading losses as tariff uncertainty weighs

Group 1: Supreme Court Ruling and Tariffs - The Supreme Court ruled 6-3 to void most tariffs imposed by Trump, stating the emergency law used did not permit such tariffs [1] - Trump announced a new global levy of 10% to 15% that may last five months while seeking alternative solutions [1] Group 2: Market Reactions - All three main stock indexes experienced weekly gains, with the Nasdaq ending a five-week losing streak [2][10] - The market is undergoing profit-taking as traders assess the sustainability of the relief rally following the Supreme Court decision [4][10] Group 3: Sector Performance - The consumer discretionary index led declines, with major companies like Amazon and Tesla down approximately 2% each [5][10] - The S&P 500 software and services index fell 2.9%, down nearly 23% year-to-date, amid fears of AI disruption affecting major software firms [6][10] - The healthcare sector rose 1%, driven by Eli Lilly's 3.4% increase after a successful trial against a competitor's drug [7][10] Group 4: Economic Indicators and Expectations - Federal Reserve Governor Waller indicated a possibility of keeping rates unchanged in March if job data shows improvement [8][10] - Traders anticipate the Fed's next rate cut move in June, according to the CME FedWatch Tool [9][10]