IBM is on pace for its worst day ever

IBM is on pace for its worst day ever
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By David Goldman, CNN (CNN) — An extraordinary warning from IBM CEO Arvind Krishna sent shares plunging – on pace for their worst day in the 115-year-old company’s history. IBM (IBM) shares plunged 24% in premarket trading. Its worst day ever was October 19, 1987 – aka Black Monday – when sha...