IBM issued profit warning after weak second quarter, triggering selloff in software sector including MicrosoftShares in IBM plunged more than 25% on Tuesday after the US tech giant released disappointing preliminary second-quarter results. IBM’s stock was on track for an even steeper single-day decline than it suffered during the 1987 “Black Monday” crash.IBM had issued a profit warning and blamed shifts in corporate customers’ spending. The company said revenue for the three months ending in J
IBM loses quarter of its value as tech giant’s shares plunge and profits falter
