HELSINKI (Reuters) – Nokian Tyres has signed an agreement to sell its Russian operations to Russian oil producer Tatneft PJSC for 400 million euros ($398.7 million), the Finnish company said on Friday. At the end of June, Nokian Tyres said it would initiate a controlled exit from the Russian market due to Russia’s war in Ukraine. The company, which used to make 80% of its passenger car tyres in Russia, has been operating in the country since 2005. “The transaction is subject to approval by the relevant regulatory authorities in Russia and other conditions, which creates substantial uncertainti…