Investors reacted to the Federal Reserve's decision to leave rates unchanged, by handing the S&P 500 its biggest percentage gain for a Fed day since last July. The Nasdaq Composite had its best Fed day since Nov.

U.S. stock indexes are rising as Wall Street waits to hear what the Federal Reserve will say about where interest rates may be heading

U.S. stocks climbed again on Monday as Wall Street’s wild roller-coaster ride veers back upward. The S&P 500 rose 0.6% for a second straight gain after it fell 10% below its record late last week. The Dow Jones Industrial Average climbed 353 points,