Stocks were firmly in the red in early afternoon trading Tuesday, hurt once again by another sharp drop in oil prices. The Nasdaq fell 1.2% while the Dow Jones industrial average and S&P 500 each lost 0.9%. NYSE and Nasdaq volume was tracking higher than Monday, more so on the Nasdaq. Another drop in oil prices weighed on sentiment. Crude oil lost an additional 4% to $47.91 a barrel.