U.S. stocks mixed, Nasdaq falls 150 points. Abbott Labs beats Q2 estimates and raises guidance, stock jumps 12.1%. Other big gainers include ATAI, MAN, DSGR, CDNA, MAAS, HELP, RHI, SMG, FWRD, UNH, JBHT.

US stock futures mixed, investors to focus on UnitedHealth, J B Hunt, Abbott, TSMC and GE Aerospace earnings. TSM beats expectations.

Abbott stock jumped early Thursday on better-than-expected second-quarter metrics. The company also raised its profit view.