Shares in DoorDash Inc (NYSE:DASH) lifted by 1%, while Lyft Inc (NASDAQ:LYFT) jumped by 31% after reporting strong earnings and retaining some gains from an accounting error. To rub salt into the wounds, Uber Technologies Inc (NYSE:UBER, ETR:UT8) shares soared 12% higher after it unveiled a maiden US$7 billion share buyback. "Today's authorization of our first-ever share repurchase program is a vote of confidence in the company's strong financial momentum," Uber's chief financial officer Prashanth Mahendra-Rajah said.