If you look at the charts for some alternative energy stocks, for instance, you'll see how they slumped as the week kicked off -- some even plunging to 52-week lows -- only to bounce back just as dramatically even as I write this. Believe it or not, shares of Ballard Power Systems (NASDAQ: BLDP), Clean Energy Fuels (NASDAQ: CLNE), and Blink Charging (NASDAQ: BLNK) are up more than 15% each in the past two days through 2 p.m. ET Friday, but they're still down for the week according to data provided by S&P Global Market Intelligence. Clean Energy Fuels announced its first-quarter numbers late last week.