Commodities Negative crude prices: Will MCX follow BSE and tweak trading system? Updated : April 29, 2020 05:45 AM IST The CME group, which owns NYMEX, had issued a notice on April 15 informing members that it was making changes to the trading system to process negative prices for crude futures. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.