(Bloomberg) -- Emerging-market advanced, trimming the biggest monthly slide since June, after better-than- estimated U.S. data bolstered optimism about global growth. Russia’s ruble tumbled to the lowest level in four years.

The MSCI Emerging Markets Index increased 0.3 percent to 1,007.94 at 11:05 a.m. in New York, paring its decline for the month to 2.6 percent. South Africa’s benchmark stock-index led gains among major developing-nation gauges as Naspers Ltd. climbed 2.3 percent. Brazil’s Ibovespa rose for the first time in three days as Itau Unibanco Holding SA drove a rally in lenders. The ruble retreated to the lowest level since 2009 against the central bank’s target basket of dollars and euros.

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