US stock market: Indices fall 1% as regional banks tumble, investors fret before Fed

Major U.S. stock indexes fell more than 1% on Tuesday as regional bank shares tumbled and investors awaited the Federal Reserve’s decision about interest rates. The KBW regional banking index fell 5.5% in its biggest daily percentage drop since March 13, while S&P 500 energy and financial sectors fell 4.3% and 2.3% respectively.