Banking sector woes trigger market slide ahead of Fed meeting.

Major U.S. stock indexes fell more than 1% each on Tuesday as regional bank shares tumbled on renewed fears over the financial system and as investors tried to gauge how much longer the Federal Reserve may need to hike interest rates. The Fed is expected to announce Wednesday it will raise rates 25 basis points, and investors are anxious for any signals from the central bank on whether it will be the last hike for now, or if further increases are possible if inflation remains high. Energy shares dropped along with oil prices as investors worried about a potential U.S. debt default.