Dutch front-month futures, the European benchmark, rose 4.3% to €72.50 a megawatt-hour at 8:55 a.m. in Amsterdam. The UK equivalent contract was 7.1% higher.

Brent was up $1.63, or 2.1%, to $79.47 a barrel, WTI gained $1.41, or 1.9%, to $74.25.

Russia said Dec. 28 it will ban crude supplies to countries that observe the G7's $60/b price cap from Feb. 1 for five months. The retaliatory move, which applies at all stages of supply to the final buyer, had been widely flagged by Russia and expected by the global oil market.

Dutch front-month futures, the European gas benchmark traded 2% higher at to €66.30 per megawatt-hour by 12 p.m. in Amsterdam. The UK equivalent contract also rose. German power for next month increased 2.3% to €166 per megawatt-hour.

Brent was up 22 cents, or 0.3%, at $84.14 a barrel, WTI gained 7 cents to $79.63.

Brent rose 8 cents, or 0.1%, to $80.07 per barrel, WTI fell 1 cent to $76.22.

"The TTF month-ahead settlement price for derivatives is by far the most widely used benchmark in gas supply contracts across the EU, followed by maturities of two-month ahead and year ahead," it states.

Brent gained 42 cents, or 0.5%, to $79.46 a barrel, WTI was at $74.67, up 38 cents, or 0.5%.

Dutch front-month futures, Europe’s gas benchmark were down 1.3% at €114 a megawatt-hour at 8:51 a.m. in Amsterdam.

Russia's war against Ukraine that started in February has exacerbated gas prices. But the excesses of the TTF had already been detected before, with rises of more than 700% in 2021.