Shares of Plug Power Inc. /zigman2/quotes/205453512/composite PLUG +2.68% surged 5.3% in active morning trading Thursday, to reach the highest price seeing during regular-session hours since August 2014 in intraday trading, after the hydrogen engine maker announced a partnership to build zero-emission commercial trucks. Trading volume swelled to 17.5 million shares, already more than the full-day average of 15.1 million shares. Plug said it was partnering with Lightning Systems, which develops zero-emission drivetrains, to offer the first electric, fuel cell-powered Class 6 trucks (up to 12.5 tons), which are capable of supporting middle-mile delivery logistics. The standard vehicle will have an average range of more than 200 miles, with an extended range option available at 400 miles. The trucks are expected to be commercially available to the public in the third quarter of 2020. Plug's stock has rocketed 91% year to date, while the S&P 500 /zigman2/quotes/210599714/realtime SPX +1.23% has gained 4.8%.