Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Merck (MRK) upgraded to Buy from Neutral at BofA/Merrill with analyst Colin Bristow citing its opportunity in first line lung cancer. 2. Viacom (VIA, VIAB) upgraded to Market Perform from Underperform at Wells Fargo and to Buy from Underperform at BofA/Merrill. 3. TD Ameritrade (AMTD) and Charles Schwab (SCHW) were upgraded to Buy from Neutral at BofA/Merrill. 4. Talend (TLND) upgraded to Buy from Neutral at Goldman with analyst Jesse Hulsing saying the company will benefit from analytic workloads moving to the cloud. 5. CSC (CSC) upgraded to Buy from Neutral at Citi. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage,
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