(NOTE: This article is outdated, as ZipCar, after losing millions, was sold to AVIS for $12 a share.)
UPDATE: AVIS is buying Zipcar for $12 a share - likely in a stock swap. If you bought Zipcar at $25 a share, this represents a 50% loss. On the other hand, if you bought it last week at $8 a share, you just made 50%. And this illustrates how you can make money on a stock through a buyout.
"For nearly all of 2012, though, shares of ZipCar were trading for under $15—and under $10 since August. The company’s flailing stock price reflected ZipCar’s larger struggles. It had lost $55 million since 2007, never once turning a profit, though it was expected to make at least a few million last year. More importantly, ZipCar simply couldn’t attract more members quickly enough to expand and make the business more viable, according to the Wall Street Journal."