Shares of the database specialist crashed earlier this year but are making a comeback. Shares of database company MongoDB (MDB -0.29%) were once a highflier, exceeding $500 earlier this year. But that changed after the company announced results for its fiscal first quarter, ended April 30. Management noted a slowdown in revenue growth and reduced its guidance for the current fiscal year. MongoDB stock promptly plunged, eventually reaching a 52-week low of $212.74 in August. But on Aug. 29, the company repor ...