Premarket movers: Mag 7 stocks mixed (Nvidia +0.6%, Microsoft +0.2%, Tesla +0.1%, Apple little changed, Amazon little changed, Meta -0.2%, Alphabet -0.3%). Elanco Animal Health (ELAN) gains 4.9% with the company to replace Sarepta Therapeutics in the S&P MidCap 400 effective Sept. 2. MongoDB (MDB) shares soar 31% after the software company reported second-quarter results that were much stronger than expected. It also raised its full-year forecast. nCino (NCNO) gains 11% after reporting adjusted earnings per share for the second quarter that beat the average analyst estimate. Okta (OKTA) is up 5.4% after the software company reported second-quarter results that beat expectations and raised its full-year forecast. Source: BBG(zerohedge)