Rocket Lab Corp (NASDAQ:RKLB) shares are trading marginally higher Thursday afternoon as investors position ahead of the space launch and spacecraft maker's fourth-quarter earnings report, due after the closing bell. Here’s what investors need to know.Rocket Lab stock is taking a breather. What’s next for RKLB stock?Loss Expected To NarrowWall Street expects Rocket Lab to post revenue of $178 million for the quarter, up from $132 million a year earlier, marking a third consecutive quarterly revenue record i ...