Wednesday was a strong day for the stock market, as investors continued to be optimistic about the future of the U.S. economy. Major market benchmarks climbed more strongly than in sessions earlier in the week, with gains of 1% or more sending both the S&P 500 and the Dow Jones Industrials to new record highs. Yet even though the overall market performed well, some stocks got left out, and Flotek Industries (NYSE: FTK), Oxford Industries (NYSE: OXM), and bluebird bio (NASDAQ: BLUE) were among the worst performers on the day.