Shares in U.S. tech stocks recovered slightly premarket after a heavy selloff in the prior session.Oracle climbed 1% premarket, having dropped 5.4% to a six-month low Wednesday. Broadcom stock is also on the rise after shedding roughly $422 billion of its market cap over the last five trading days.The tech-heavy Nasdaq has fallen four of the past five sessions. There are broader concerns for markets than company-specific news, Deutsche Bank's Jim Reid wrote. ...