Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. KB Home (KBH) upgraded to Buy from Underperform at BofA/Merrill with analyst John Lovallo saying KB Home's execution, margins and returns have exceeded his expectations for numerous quarters and expects solid homebuilding growth through 2020. 2. Sirius XM (SIRI) upgraded to Outperform from Market Perform at Barrington with analyst James Goss stating he is impressed with the longer-term story Sirius continues to offer and considers the recent downward move in the stock price as providing a buying opportunity. 3. Matador (MTDR) upgraded to Buy from Hold at KLR Group with analyst Gail Nicholson saying the company offers investors "solid" execution, a "strong" balance sheet and numerous catalysts which could unlock incremental value. 4. Duluth Holdings (DLTH) upgraded to Outperform from Market Perform at William Blair with analyst Dylan Carden stating he has greater conference that the direct channel will stabilize and even likely accelerate as new retail markets enter their second year. 5. American Express (AXP) upgraded to Buy from Neutral at Buckingham with analyst Chris Brendler citing the DOJ case being resolved and evidence of "compelling momentum" across its platform. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.