Going parabolic is a rare feat on the stock market, but more than a few artificial intelligence (AI) stocks have already done so. Super Micro Computer, for example, is up 161%. Arm just jumped nearly 50% on its earnings report, and investors seem to be falling over themselves to get their hands on the next big AI winner. Shares of small-cap adtech company Perion Network (PERI -0.94%) were moving in the opposite direction after its fourth-quarter earnings report on Feb. 7. The stock tumbled 20% as its revenu ...