U.S. Stocks End Choppy Session Mostly Lower

U.S. stocks ended Thursday's thinly-traded session mostly lower, as investors grappled with a drop in oil prices and a continued impasse between Greece and its creditors over loans. Meanwhile mixed economic reports offered little guidance about the Federal Reserve's timetable for hiking rates. The S&P 500 ended 2.23 points, or 0.1%, lower at 2,097.45. The Dow Jones Industrial Average dropped 44.08 points, or 0.2%, to 17,985.77. The Nasdaq Composite defied the general trend and closed 18.34 points, or 0.4%, higher at 4,924.70. The tech-heavy index closed higher for the seventh consecutive day.