Hydrogen producer and distributor Plug Power (NASDAQ:PLUG) stock jumped 9% on July 11 and another 4% overnight on hopes that a Federal Reserve rate cut would make its plans more affordable.Shares that were trading at $2.65 late on July 10 were trading at over $3.04 before the market opened this morning, July 12. That put the market capitalization at about $2.25 billion for a company expecting revenue of about $900 million.Other clean energy stocks like SunRun (NASDAQ:RUN), Sunpower (NASDAQ:SPWR), and Enphas ...