Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Halliburton (HAL) upgraded to Buy from Neutral at BofA/Merrill with analyst Timna Tanners citing an increase in the firm's WTI crude forecast to $69/bbl for 2019. 2. Groupon (GRPN) upgraded to Neutral from Sell at UBS with analyst Eric Sheridan citing its first quarter results, which continued a string of recent "very solid" earnings reports. 3. AIG (AIG) upgraded to Buy from Neutral at Goldman Sachs with analyst Yaron Kinar saying AIG reaching break-even underwriting in its "much-criticized" General Insurance business will serve as a catalyst for shares in the second half of 2018. 4. Carvana (CVNA) double upgraded to Buy from Sell at B. Riley FBR and upgraded to Buy from Hold at Deutsche Bank. 5. Wolverine World Wide (WWW) upgraded to Neutral from Negative at Susquehanna. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.