MOSCOW, October 14 (RIA Novosti) - Russia's leading stock exchange finished trading on Tuesday with its index showing large gains on positive news from U.S. and European stock markets.

The benchmark RTS index closed at 869.51 points, or 9.90% up from Monday, climbing past the psychologically important level of 800 points.

Price gains were led by metals giant Norilsk Nickel (up 22.03%), gas monopoly Gazprom (12.80%), independent crude producer LUKoil (14.205%) and retail savings bank Sberbank (16.13%), while the oil company Tatneft saw its stock drop 1.36%.

Russia's MICEX and RTS indices have lost over 60% of their value since their high-points in May this year. The ruble-denominated MICEX hit a three-year low of 700.37 last week.