Why Analogic, QuinStreet, and MSC Industrial Direct Slumped Today

The mood was negative on Wall Street on Wednesday, and most major benchmarks finished in the red. Strength in the technology sector wasn't enough to lift more cyclically focused benchmarks like the Dow Jones Industrial Average, and the combination of an attack on Saudi Arabia that sent oil prices higher and some disquieting readings on the inflation front kept investors from feeling more confident about stocks going into earnings season.

In addition, some individual companies had bad news that sent their shares lower. Analogic (NASDAQ: ALOG), QuinStreet (NASDAQ: QNST), and MSC Industrial Direct (NYSE: MSM)were among the worst performers on the day. Here's why they did so poorly.