Healthcare review: Tranzyme, AcelRx, Gilead Sciences, AspenBio Pharma, Threshold Pharmaceuticals Are Notable Movers
Posted on November 15, 2012 at 15:18 PM EST
The S&P 500 was on track to fall for a third day on Thursday as Wal-Mart Stores Inc reported disappointing results and investors feared the "fiscal cliff" will harm the economy.