This speculative space stock could blast off as the market warms up again. Rocket Lab USA (RKLB 8.75%), the creator of the Electron orbital rocket, went public by merging with a special purpose acquisition company (SPAC) three years ago. The combined company's stock started trading at $11.58, soared to an all-time high of $20.72 just two weeks later, but now trades at less than $7 a share. Like many other SPAC-backed companies, Rocket Lab set the bar too high during its pre-merger investor presentation. Whe ...