In energy trading, oil fell below $97 a barrel Monday on signs that the U.S. and Iran may restart nuclear negotiations. Oil futures had been rising steadily from around $86 a barrel in mid-December as hopes rose for an improving world economy, climbing close to $100 at the end of January.
Benchmark oil for March delivery fell $1.60, or 1.6 percent, to $96.17.
In other energy trading, heating oil and wholesale gasoline also fell, while natural gas rose.
March heating oil declined a fraction of a cent, or 0.2 percent, to finish at $3.1540 a gallon, and wholesale gasoline for March delivery dropped 4.2 cents, or 1.4 percent, to end the day at $3.0115 a gallon.
Natural gas for March delivery rose 1.4 cents, or 0.4 percent, to end at $3.3150 per 1,000 cubic feet.