https://www.reuters.com/article/us-gamestop-hot-companies-factbox/factbox-stocks-shunned-by-wall-street-surge-as-gamestop-effect-snowballs-idUSKBN29W2T1

Amateur stock traders made a concerted effort to buy shares of companies shunned by Wall Street, challenging short positions by hedge funds, and costing some professionals billions of dollars on their bearish bets and inflating stock valuations.