Goldman Sachs raised its rating on Zipcar Inc. (ZIP, $7.48, +$0.45, +6.40%) to buy from neutral, calling it a "high-risk, high-reward contrarian call." The firm listed a series of drivers it sees for better-than-expected earnings at ZipCar, including the potential for it to be an "attractive niche" within a travel company. "Even with a number of admittedly self-induced missteps ,the Zipcar model has shown resilience as there are truly few hourly rental/transportation alternatives that have ZIP's brand recognition," Goldman wrote.
This is the closest I could find... Please post the email if you have one.