Assets held in exchange-traded funds reached $994.5 billion by the end of 2010, according to data compiled by the National Stock Exchange. That is up 27.1%, compared to a year earlier.

This compares to the $927.6 billion held in ETFS at the end of November, as reported on December 30 by the Investment Company Institute, the trade group. That compared to $923.5 billion at the end of October 2010 and $737.9 billion at the end of November 2009.

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