Iron Ore Prices Top Out And Help Test Support For RIO And BHP By: TalkMarkets March 23, 2018 at 07:16 AM EDT BHP Billiton gapped down and instantly reversed the previous day’s surge. Rio Tinto lost 4.6% on its way to a 3-month closing low. Read More >> Related Stocks: Bhp Billiton Ltd ADR Rio Tinto Plc ADR