A closely watched U.S. natural gas price spread flipped to negative, signaling that traders have all but given up already on the prospect of a cold winter.

Gas for January delivery is now trading below February prices, a first for the 2021 contracts. January futures tumbled to a two-month low on Thursday, for the worst performance among major commodities, as near-term forecasts for chillier conditions were scaled back. Temperatures may be above normal in much of the Midwest and parts of the Northeast in mid-December, according to The Weather Company.

“This is Gas Vegas — it’s gambling on picking a bottom at this point,” said Bob Yawger, director of the futures division at Mizuho Securities.

January gas futures are now trading at a discount to February

Gas for January delivery slumped 9.8% to $2.507 per million British thermal units on the New York Mercantile Exchange, the lowest close since the beginning of October. February futures slid 9.5% to $2.515.

Warmer weather forecasts for December are also taking their toll on the March-April gas spread, which narrowed to a record low for the 2021 contracts, suggesting that traders are betting on abundant supplies by the end of the heating season. Known as the “widowmaker” because of its volatility, the spread has shrunk by more than 50% in December alone.

The amount of gas in storage remains stubbornly high at 3.939 trillion cubic feet, or 7.9% above the five-year average, according to the Energy Information Administration.

“It’s the La Niña weather pattern,” said John Kilduff, founding partner, Again Capital. “We were supposed to get bursts of warmth, not consistent warmth. There were supposed to be bouts of cold. That didn’t happen.”