In the near term, a potential Hertz bankruptcy could result in a flood of used vehicles to auctions in an attempt by lenders to get some value back. Depending on how much of the fleet sells and how quickly, it could send used-car prices down even further, which isn't great news for Avis. However, a Hertz bankruptcy would almost certainly lead to Avis market share gains once travel and transportation rebound. What happens to Hertz is up in the air, but Morgan Stanley's upgrade confirms that Avis is far better positioned to weather the COVID-19 pandemic, and that's reflected in today's stock price gain and the difference between the rivals over the past month.