(Bloomberg) -- International Business Machines Corp. dropped about 9% in extended trading after the company’s weak consulting unit sales disappointed investors, overshadowing its acquisition of software firm HashiCorp Inc.Most Read from BloombergBiden’s Gains Against Trump Vanish on Deep Economic Pessimism, Poll ShowsTaylor Swift Is Proof That How We Critique Music Is BrokenTech Giants Hit in Late Hours After Meta’s Outlook: Markets WrapBiden’s New Chopper Is Demoted After Scorching White House Read this story at Yahoo Finance , Bloomberg.com , Bloomberg.com