Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Facebook (FB) upgraded to Buy from Neutral at Guggenheim with analyst Michael Morris saying investors will continue to gain comfort with the incremental financial risk created by Facebook's content and privacy concerns. 2. NIO Inc. (NIO) upgraded to Buy from Neutral at Citi and to Neutral from Underperform at BofA/Merrill. 3. Ingersoll-Rand (IR) upgraded to Buy from Neutral at BofA/Merrill with analyst Andrew Obin citing premium core and earnings growth. 4. EOG Resources (EOG) upgraded to Buy from Hold at Tudor Pickering. 5. Signature Bank (SBNY) upgraded to Overweight from Neutral at JPMorgan with analyst Steven Alexopoulos raising his price target for the shares to $150 from $133. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.