Jefferies Says Sell Merck, Buy Bristol-Myers Heading Into New Year By: TalkMarkets December 19, 2016 at 12:48 PM EST Shares of Merck are sliding after Jefferies analyst Jeffrey Holford downgraded the stock to Underperform. Read More >> Related Stocks: AbbVie Astrazeneca Plc ADR Bayer Aktienges ADR Bristol-Myers Squibb Eli Lilly Johnson & Johnson Merck & Co Monsanto Co Novartis Ag ADR Novo Nordisk A/S ADR Pfizer Roche Holding AG Basel American Depositary Shares Sanofi-Aventis S.A. ADR