MIXED RESULTS: Metals, grains and soybeans rose while oil and energy products were mixed ahead of a key vote that could help resolve Greece's debt crisis.
GREECE CRISIS: The results of the confidence vote in Greece's prime minister are scheduled to be announced after U.S. markets close. If successful, it's expected he will be able to implement budget cuts sought by European leaders before they agree to loan Greece more money.
DOLLAR'S IMPACT: Most commodities benefited from a weaker dollar. Commodities are priced in dollars so a weaker dollar makes them cheaper for buyers using other currencies.