Oil prices eased on Monday, reversing their rally on Friday, as renewed concerns over waning demand in the United States and China dented market sentiment.
Brent crude futures for January were down 35 cents, or 0.4%, at $81.08 a barrel at 0051 GMT, while the U.S. West Texas Intermediate (WTI) crude futures for December were at $76.82, down 35 cents, or 0.5%.
