Elon Musk boosted the price of GameStop after he tweeted a link to the Reddit board where small investors had made a play to buy the stock at a low price: https://www.cnbc.com/video/2021/01/27/gamestop-jumps-elon-musk-tweet-link-reddit-board-experts.html Afterward, he tweeted about the scam. Read it here: https://twitter.com/elonmusk/status/1354890601649610753 "u can’t sell houses u don’t own u can’t sell cars u don’t own but u *can* sell stock u don’t own!? this is bs – shorting is a scam legal only for vestigial reasons"