Gold tumbled the most in 11 weeks as the Federal Reserve refrained from taking more stimulus measures and as a stronger dollar curbed demand for alternative assets.

The dollar rose to an 11-month high against the euro as Italian borrowing costs increased at a debt auction. The Standard & Poor’s GSCI index of 24 commodities dropped as much as 2.7 percent. The Federal Reserve yesterday said the U.S. economy is maintaining its expansion and refrained from taking new action to bolster the economy.