The S&P 500 closed down 0.24% to 1,427 on Monday.
The U.S. markets closed early today in advance of the Christmas holiday.
The Nasdaq was off 0.28% to 3,013, while the Dow Jones Industrial Average was down 0.39% to 13,139.
The yield on a 10-year treasury bond rose 1.14% to 1.77%.
The price of gold fell 0.04% to $1,659 per ounce.
Shares of Seal Beach-based Clean Energy Fuels Corp. fell about 2% to $13 for a market value of $1.1 billion. Energy companies were generally down on Monday.
Irvine-based Sabra Health Care REIT Inc. was down about 2% to $21 for a market value of $789.2 million. Sabra announced its acquisition last week of the 60-bed assisted living facility Stoney River Marshfield in Wisconsin for $8.2 million in a sale-leaseback transaction.