Reference prices for natural gas in Europe fell on Friday, for the fourth day in a row, after Russia announced it was excluding a number of important raw materials from the list of products that will be affected by export restrictions, Bloomberg reports.

On the Amsterdam Stock Exchange, reference prices for gas delivered the following month fell by 8.2% on Friday, to 116 euros for a Megawatt-hour, which is less than half of the all-time high reached on Monday.

Russia on Thursday announced an export ban on about 200 products, after the Russian economy was hit by sanctions following the invasion of Ukraine. But Moscow has not limited its sales of energy and raw materials, Russia’s largest contribution to world trade. The ban applies until the end of this year, according to Agerpres.

This announcement has reassured markets about a possible restriction on gas supplies to Europe. Russia is the EU’s largest supplier of natural gas, accounting for 40% of the bloc’s imports. Data provided by network operators show that exports of Russian natural gas through Ukraine continue normally on Friday.

However, traders are still watching the war in Ukraine, as the presence of Russian troops poses a risk to energy networks. Earlier this week, Russian and Ukrainian officials issued warnings about risks to gas transit infrastructure after Russian troops entered natural gas pumping stations into Europe. Russia has also threatened to cut off gas supplies via the Nord Stream 1 pipeline to Europe.