Benzinga's Top Downgrades By: Benzinga via Benzinga April 21, 2015 at 09:21 AM EDT Analysts at Stifel Nicolaus downgraded Houghton Mifflin Harcourt Co (NASDAQ: HMHC) from Buy to Hold and removed the price target of ... Read More >> Related Stocks: Constellation Brands Eversource Energy Houghton Mifflin Har Laredo Petroleum Holdings Inc Lennox International Newfield Exploration Noble Energy Oceaneering International Pioneer Natural Resources Shake Shack Inc iPath Dow Jones-Goldman Sachs Crude Oil Fund