Meme traders see red as heavily-shorted stocks grow scarcer and old names fall By: MarketWatch September 29, 2021 at 18:39 PM EDT On a bad day for retail investors, the only good news is some potentially bad news for Robinhood. Read More >> Related Stocks: AMC Entertainment Holdings, Inc. Class A Common Stock Aterian, Inc. - Common Stock BlackBerry Limited Common Stock Camber Energy, Inc. Common Stock Canoo Inc. - Class A Common Stock Clean Energy Fuels Corp. - Common Stock GameStop Corp Katapult Holdings, Inc. - Common Stock Koss Corporation - Common Stock Robinhood Markets, Inc. - Class A Common Stock Vinco Ventures, Inc. - Common Stock Warby Parker Inc. Class A Common Stock