5. American Not-So-Superconductor Shares of American Superconductor Corp., which makes electrical systems for wind farms, fell 5% on Monday and another 5% on Tuesday. The stock is down nearly 40% since mid-April and more than 70% year-to-date. Sorry guys, but that's not "super" at all. In fact, that sucks. ... Click to view a price quote on C. Click to research the Banking industry.