David Paul Morris | Bloomberg | Getty ImagesSuper Micro Computer is joining the S&P 500 following a historic rally in the stock that has pushed the company's market cap past $50 billion.The shares, up more than 20-fold in the past two years and over 200% just since the start of 2024, climbed another 8% in extended trading on Friday.Super Micro is replacing Whirlpool, according to a press release. Deckers Outdoor is also joining the S&P 500, replacing Zions Bancorporation.Stocks added to the benc...