Shares of electric vehicle (EV) charging company ChargePoint (CHPT 0.86%) jumped as much as 12% today after the announcement of an agreement with General Motors to accelerate the installation of fast EV charging stations across the U.S.ChargePoint shares have languished this year, but were jumping on the news today. After rising by more than 12%, however, shares lost much of that gain, higher by just 3% as of 3:20 p.m. ET.Expanding EV charging with GM EnergyOver the next year, the companies plan to install ...