softbank group corp was among the mostsignificant victims of a selloff of tech stocks across asia on thursday with investors turning sour on billionaire masayoshi son’s firm as the tightening phase of central bank policies emerges the stock dropped as much as 98 in tokyo the most since march 2020 as nasdaq futures tumbled and shares of the firm’s biggest investment alibaba group holding ltd dropped in hong kong hawkish signals from federal reserve chair jerome powell led investors to wager against technology companies which have powered much of the recent growth in global markets  something softbank has been gambling on with its vision funds of speculative tech bets