European natural gas prices fluctuated as US President Donald Trump lifted the moratorium on new export licenses, reducing uncertainty about long-term global supply.

Benchmark futures swung after gaining more than 2% in the previous session. Trump revoked a measure enacted by his predecessor, paving the way for applications for new U.S. LNG export permits.

The US president also reiterated his call for the European Union to buy more US oil and gas if the bloc wants to avoid tariffs. The U.S. is already Europe’s biggest supplier of liquefied natural gas.

While the move on new permits was widely expected, it helps ease some concerns after a volatile start to the year. “It could have an impact on the global LNG market, where supply and demand are structurally tight,” Japan’s Trade Minister Yoji Muto said, Bloomberg reports.