MongoDB, Surgery Partners, Harrow And Other Big Stocks Moving Lower In Tuesday's Pre-Market Session - Applied Optoelectronics (NASDAQ:AAOI), Cerus (NASDAQ:CERS)

U.S. stock futures were lower this morning, with the Dow futures falling around 800 points on Tuesday.Shares of MongoDB Inc (NASDAQ:MDB) fell sharply in pre-market trading after the company reported fourth-quarter financial results and issued first-quarter adjusted EPS guidance below estimates.MongoDB reported quarterly earnings of $1.65 per share, which beat the Street estimate of $1.45, according to Benzinga Pro. Quarterly revenue of $695.07 million beat the consensus estimate of $667.15 million and was u ...