Why Vicor Stock Plummeted by 23% on Wednesday

Power module specialist Vicor's (VICR -22.89%) was looking anything but powerful on Wednesday, as its shares lost more than 23% of their value. The culprit was a quarterly earnings report that investors found not to their liking, to put it mildly. Vicor's slide came on a not-bad day for stocks overall, which saw the S&P 500 index close up marginally (by almost 0.2%).Improvements in key line items, but...Vicor published its first-quarter earnings after market hours on Tuesday, and the market's blowback was s ...