ToplineThe Supreme Court’s signaling it may uphold a ban on TikTok, the wildly popular shortform video social media app, sent shockwaves through the stock market Friday, boosting shares of companies behind rival platforms and hitting hard one key TikTok partner.Protestors stand outside of the Supreme Court on Friday.Getty Images Key FactsThe Supreme Court heard oral arguments Friday in TikTok’s appeal against a law requiring its private Chinese parent company ByteDance to divest its TikTok holdings by or fa ...