Micron (MU) stock rose early on Wednesday after the chipmaker reported fiscal fourth quarter earnings that surpassed Wall Street's expectations. The results after the bell on Tuesday are seen as a positive signal for the AI trade and for investors hoping the chipmaker's stock can sustain its recent upswing. The stock briefly climbed around 2% in premarket trading, having risen soon after the report to $171.50, above its all-time intraday high last week. Micron's fiscal fourth quarter revenue of$11.3 b ...