Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. O'Reilly Automotive (ORLY) upgraded to Outperform at Oppenheimer by analyst Brian Nagel, who said the Aftermarket Auto Parts Retail market represents a "clear bright spot" in the current consumer spending environment. 2. Wynn Resorts (WYNN) upgraded to Overweight at Morgan Stanley with Thomas Allen saying that Macau is in the process of stabilizing and Wynn's share can grow to 13%-14% from 10% with the opening of the Wynn Palace. Allen said Wynn will have double digit EBITDA growth in the next six months, which should continue to drive stock momentum. 3. Zillow (Z) upgraded to Outperform at RBC Capital citing positive data from surveys of real estate agents and consumers, insider buying of the company's stock, and valuation. The firm says the surveys show that online traffic trends remain strong, while Zillow's share among agents has hit record highs. 4. AIG (AIG) upgraded to Neutral at Atlantic Equities. 5. Petrobras (PBR) upgraded to Equal Weight at Morgan Stanley. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.