BMO Capital Downgrades BHP Billiton To Market Perform By: Benzinga via Benzinga May 22, 2015 at 08:58 AM EDT Analysts at BMO Capital downgraded BHP Billiton Limited (ADR) (NYSE: BHP) from Outperform to Market Perform. BHP Billiton shares have ... Read More >> Related Stocks: Bhp Billiton Ltd ADR