MOSCOW, May 13 (Reuters) - The Russian rouble

strengthened against the U.S. dollar on Monday. By 0715 GMT, the

rouble was 0.42% higher at 91.87 to the dollar

after trading in a range of 91.778 to 92.575.

Against the euro, the rouble rose 0.5%

to 99.00 and gained 0.36% to 12.65 against the yuan

.

Brent crude oil, a global benchmark for Russia's

main export, was flat at $82.79 a barrel.

Russian stock indexes rose. The dollar-denominated RTS index

rose 0.76% to 1,186.99. The rouble-based MOEX Russian

index gained 0.34% to 3,461.65.

($1 = 91.8700 roubles)

(Reporting by Reuters)