Polo Ralph Lauren Corp, (NYSE: RL) stock rallied 9.7% to $127.00 Wednesday, on volumes of nearly 2.5 million or three times its normal volume, after the retailer delivered a $168.4-million U.S. profit — thanks to solid holiday season sales.

Micron Technology Inc. (Nasdaq: MU) traded in 33.1 million shares Wednesday, closing in on its daily average of 35.6 million. Prices dipped 1.1% to $11.32.

MediaMind Technologies, Inc. (Nasdaq: MDMD) shares tumbled 15.1% to $13.54 Wednesday. Volume was 172,646 shares, nearly triple its full-day average, a day after reporting quarterly revenues of $25.9 million, or 15% from the prior-year quarter.