Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. TD Ameritrade (AMTD) upgraded to Buy from Neutral at UBS with analyst Brennan Hawken saying he believes "misperceptions about late cycle risk" has created an attractive entry point for shares. 2. Helmerich & Payne (HP) upgraded two notches to Buy from Sell at SunTrust, to Buy from Neutral at Citi, and to Neutral from Underperform at Credit Suisse. 3. Viking Therapeutics (VKTX) upgraded to Strong Buy from Outperform at Raymond James with analyst Steven Seedhouse saying he thinks TR-B remains one of the most promising mechanisms with proof-of-concept in NASH based on VK2809 and MGL-3196 data presented and conversations with physicians. 4. Big Lots (BIG) upgraded to Overweight from Neutral at Piper Jaffray with analyst Peter Keith saying he expects a "strong" tax refund season in early 2019 for lower/moderate-income families. 5. Booking Holdings (BKNG) upgraded to Outperform from Market Perform at Wells Fargo with analyst Robert Coolbrith saying he believes current valuation offers a favorable entry point. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.

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