Stocks slid to fresh session lows late Monday as oil prices continued to weigh. West Texas Intermediate closed at $50.04 a barrel, down 5%. The S&P 500 and the Dow Jones industrial average slumped 1.9% and 1.8%, respectively. The Nasdaq dropped 1.7%. Volume spiked higher on both major exchanges in the stock market today. Among leading stocks, Virgin America (VA) stretched its loss to more than 5%.