The investigation centers on the accuracy of Green Dot’s statements about the demand for its banking-as-a-service (BaaS) platform and the sustainability of its business model. On May 9, 2019, the Company disappointed investors when it slashed guidance and announced an expensive marketing initiative to attract new users.  This news caused a massive 26% drop in Green Dot’s share price.

source https://finance.yahoo.com/news/gdot-investor-alert-hagens-berman-001800662.html?.tsrc=rss