Why Shares of EnerSys and Ameresco Are Soaring This Week, but Lithium Americas Is Crashing

From the end of trading last Friday through the market's close Thursday, shares of Enersys and Ameresco were up 12% and 17.8%, respectively, while Lithium Americas stock was down by 15%. While some green energy stocks are charging higher, one lithium stock is the subject of considerable skepticism. What's powering the bulls' buying activity? While the S&P 500 is on course to end the week lower than where it began, shares of battery stock EnerSys (ENS -0.94%) and energy-efficiency leader Ameresco (AMRC 5.17% ...