Shares of Super Micro Computer (SMCI 5.71%) are rising on Thursday. The company's stock gained 4.9% as of 2:11 p.m. ET and had gained as much as 5.2% earlier in the day. The leg up comes as the S&P 500 gained 1% and the Nasdaq Composite gained 2% on the day.A day after dropping nearly 20%, the AI server company's stock is rising after Microsoft and Meta Platforms reiterated in their Wednesday earnings calls that artificial intelligence (AI) spending was continuing apace.AI spending is still strongMicrosoft ...