$93.96 a barrel. Energy companies Halliburton, Transocean and Anadarko Petroleum all fell sharply.
Trading is expected to be light this week. Stock and bond markets are closed Thursday in observance of the Thanksgiving holiday. On Friday, the New York Stock Exchange and Nasdaq will close early.
Investors will focus on Black Friday, when the holiday shopping season officially starts. Due to the lateness of Thanksgiving, the Christmas shopping season is a week shorter than usual, and that could affect the amount of shopping people can do. An increasing number of retailers are opening up on Thanksgiving to draw in customers.