MOSCOW, December 13 (RIA Novosti) - The ruble's real effective rate slipped by an estimated 0.2% month-on-month in November 2006, but rose 7.7% year-on-year in the first eleven months of the year, the Russian Central Bank said Wednesday.

The ruble's real effective rate is calculated against the dollar/euro currency basket.

The Russian currency's real rate gained 2.0% against the dollar and lost 0.4% against the euro in November month-on-month, and gained 14.9% against the greenback and 6.6% against the European single currency in January-November, the CBR said.

The ruble's real effective rate climbed 9.6% against the bi-currency basket, and the ruble rallied 10.2% and 12.0% against the dollar and the euro, respectively, in real terms in the same period of 2005, the CBR said.