Investors eye battered miners as BHP spin-off trades By: CNBC.com News May 18, 2015 at 05:02 AM EDT As BHP Billiton's spin-off begins trading on three different exchanges, investors are eyeing the battered mining sector for longer-term opportunities. Read More >> Related Stocks: Bhp Billiton Plc ADR Glencore International Plc ADR Rio Tinto Plc ADR