The total wealth of Russia's richest businessmen has fallen by more than $28 billion since the beginning of the year, according to the Bloomberg Billionaires Index. The largest decrease was recorded by Vladimir Potanin, who lost 8.1 billion dollars from year to year, to 21.6 billion dollars. Alexey Mordashov suffered the smallest losses among the Russian participants in the rating - his capital fell by $515 million, amounting to $27.8 billion.