Emerging Market Currencies Tumble to Record Low in 'Violent' Selloff

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Emerging-market currencies are in free fall.

An index of the major developing-nation currencies fell to an all-time low this week, extending its drop over the past year to 19 percent, according to data compiled by Bloomberg going back to 1999. The Russian ruble, Colombia's peso and the Brazilian real have fallen more than 30 percent over the past year for some of the worst global selloffs.