Investors added $117.6 billion to their holdings in exchange-traded funds in 2011. That is almost identical to 2010, when they added $118.7 billion, and 2009, when they added $119.4 billion. But the value of their holdings only increased $51.4 billion, because the value of their shares fell, according to the Exchange Traded Fund Association.

By year’s end, the overall value of those holdings reached $1,060.2 billion, up from $1,008.7 billion, according to statistics compiled by the ETF Association and released Thursday morning.

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