Rocket Lab (RKLB 12.66%) stock posted gains of as much as 12% in Friday's trading, and was still up by 10.4% as of 1:30 p.m. ET. At the same time, the S&P 500 index was up 1% and the Nasdaq Composite index was up 1.4%.In addition to the bullish backdrop of the broader market, Rocket Lab stock was surging thanks to interest around SpaceX's upcoming rocket launch. SpaceX is scheduled to launch a Falcon 9 out of the Cape Canaveral Space Force Station at 8:27 p.m. ET, and that launch is powering gains for other ...