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Why Plug Power Stock Crashed on Thursday

Hydrogen fuel cell pioneer Plug Power (NASDAQ: PLUG) is taking investors on a wild ride this week. On Tuesday, the maker of fuel cells for forklifts announced a deal to supply its marquee customer, Walmart (NYSE: WMT), with up to 20 tons of green hydrogen per day. On Wednesday, however, Plug Power quickly began giving back those gains, ending the session down 5%.