COPPER MELTS: Copper fell Wednesday as the dollar strengthened on building concerns about the Fed's plan to stimulate the economy.
AWAITING THE FED: The Federal Reserve is expected to announce a plan next week to boost economic growth. The speculation centers on whether the policymakers will buy Treasurys and how much they will spend.
DOLLAR'S EFFECT: Commodities have been volatile recently on the movement of the dollar. Since commodities are priced in dollars, a stronger dollar makes them less attractive to buyers using foreign currencies.