MOSCOW. July 31 (Interfax) - The capitalization of the Russian stock market, based on Russian Trading System trading, increases 0.77%, or by $4.161 billion from the previous session, to $544.667 billion on Friday.

The leaders in market value were Gazprom , with $119.551 billion, Rosneft , with $63.377 billion, and Lukoil , with $42.273 billion.

Capitalization has increased 45.25% from $374.988 billion on December 31, 2008.