WHAT ABOUT DEMAND?: Commodity prices fell as the prospect of slower global growth deepened concerns about future demand for everything from industrial metals to corn. Investors are watching for signs of slowing economies in Europe and China.
WINNERS, LOSERS: Prices for gold, silver, copper, oil, wheat and corn fell. Soybeans finished up nearly 1 percent.
WHAT'S NEXT: A key vote is set Thursday on Greece's bond swap deal, which is required before it can receive a bailout funding package. Without additional funding, Greece could default on its debt later this month, which could shock financial markets.