The sale would yield about USD 5 billion plus "the amount of euros arising from the conversion" of USD 4.6 billion into euros "at a five day average exchange rate at the date of payment," Glencore said in a statement.
The deal leaves Glencore with 0.5 per cent and Qatar's fund with 4.8 per cent in the Russian oil company.
The money will principally be used to pay down the financing the consortium received from Italian banking group Intesa Sanpaolo and Russian banks in December 2016, when it purchased Rosneft shares.
At the time, Rosneft chief Igor Sechin said the consortium had run into trouble with financing the major part of that stake.
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Rosneft sold the 19.5-per cent stake in late 2016 in a surprise deal as part of Russia's privatisation drive -- and as a way to prop up the Russian budget which had been hit by falling oil prices.
The purchase price of 10.5 billion euros was shared equally by Glencore and the Qatar Investment Authority (QIA).
The deal leaves the Russian state controlling just over 50 per cent of the country's largest oil firm, with Britain's BP retaining the largest minority share with 20 per cent.
Chinese group CEFC, among the country's top 10 private companies, has spent in recent years about USD 915 million to acquire stakes in a Czech airline, a brewery, two media groups and a top football team.
The deal is still subject to regulatory oversight.
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