Klarna (KLAR) stock opened for trade on Wednesday at 52pershare,morethan3040 per share, the company said Tuesday, raising 1.37billionandmarkinganincreasefromitspreviouspricingestimateof35-37pershareandsignalingstrongdemandforthestock.Theopeningpricevaluesthecompanyatroughly18 billion, up from the IPO val ...