Stocks tumbled on Aug. 5, with the Dow Jones Industrial Average falling more than 1,000 points amid a disappointing jobs report released by the U.S. Labor Department on Aug. 2. The BioWorld Stock Index, which tracks approximately 510 U.S. biopharma stocks, was up 17.27% for the year on July 26 before closing Aug. 5 up only 3.47%, representing a significant drop.