Opendoor Technologies stock saw a 42% rise on Monday after a volatile trading day that saw shares double before a halt. The iBuyer platform’s stock soared 188% last week, reaching above $4.80, still far below its $39.24 all-time high. Retail trading activity surged recently, according to VandaTrack data. EMJ Capital and speculative bets from wallstreetbets have fueled the rally. Opendoor uses real estate technology to buy, repair, and resell homes but has yet to post a profitable quarter since going public. Principal Eric Jackson predicts a positive EBITDA in August and a price target of $82. The company faced potential delisting in May and settled a class-action lawsuit in June. Short bets on Opendoor hit a record level, accounting for more than 25% of the company’s float by the end of June.

Read more at Yahoo Finance.: Opendoor stock gains 42% in wild day after doubling early Monday as volatility triggers trading halt