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Drastic decision to spin-off Kyndryl will end waning run in IT services
President and former Red Hat head Jim Whitehurst leaves in management shake-up
Shares jump 8% as restructuring heralds new era for computing giant
The company has been unforgivably slow to take a leading role in a $1tn market
Arvind Krishna has already pushed group to catch up with cloud computing leaders
IBM has named a new chief executive to take over from Ginni Rometty
Successor Arvind Krishna will become the fourth Indian-born head of a prominent US tech group
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