Benchmark crude for February delivery fell 14 cents to $88.52 per barrel in electronic trading on the New York Mercantile Exchange.
On Friday, investors took money out of oil and other energy commodities, a sign that they expect the economy to slow. The contract for February delivery fell $1.47 to finish at $88.66 per barrel in New York, the contract's lowest point in three weeks.
In currencies, the euro rose to $1.3218 from $1.3176 late Friday in New York. The dollar rose to 84.42 yen from 84.23 yen.
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