Most US stocks fell, led by retailers and carmakers, after a weakening job market and falling auto sales increased concern that consumer spending will slow.

Walgreen Co. dropped after the largest U.S. drugstore chain reported lower December sales than some analysts estimated. General Motors Corp. and Ford Motor Co., the biggest U.S. automakers, retreated after sales slipped. Monster Worldwide Inc., the largest provider of job listings, decreased after reporting a decline in its employment index for last month.

About two stocks fell for every one that rose on the New York Stock Exchange. The S&P 500 was unchanged at 1,447.16. The Dow Jones Industrial Average added 12.76 to 13,056.72. The Nasdaq Composite Index dropped 6.95, or 0.3 percent, to 2,602.68. [MORE]