History is unkind to investors hopeful over OPEC deal: Analyst By: CNBC.com News January 10, 2017 at 07:49 AM EST The OPEC deal to curtail global oil production has become shrouded in doubt after Iraq posted record high export figures in December. Read More >> Related Stocks: Barclays Plc ADR Energy Select Sector SPDR US Brent Oil United States Oil Fund