Today is the unofficial end to earnings season with Wal-Mart's (NYSE:WMT) report. Below we highlight the stocks that had the best and worst days on their earnings reports this season. For stocks that report in the morning, we use that day's change. For stocks that report in the evening, we use the next day's change.
As shown, Affymetrix (NASDAQ:AFFX), Pacer (NASDAQ:PACR), and TheStreet.com (TSCM) had the best reactions to earnings reports this season with gains of more than 28%. The S&P 500 stocks on the list of best performers include Eastman Kodak (EK), Harman (NYSE:HAR), DeVry (DV), Hasbro (NASDAQ:HAS), Whole Foods (WFMI), Lexmark (NYSE:LXK), and Intuitive Surgical (NASDAQ:ISRG).