Oppenheimer Initiates Houghton Mifflin Harcourt With Outperform By: Benzinga via Benzinga June 02, 2015 at 07:58 AM EDT Analysts at Oppenheimer initiated coverage on Houghton Mifflin Harcourt Co (NASDAQ: HMHC) with a Outperform rating. The target price ... Read More >> Related Stocks: Houghton Mifflin Har