Global investor confidence rose 12.7 points this month, to 72.9, from January's revised level of 60.2, according to an index kept by State Street Global Markets, State Street Corp.'s investment research and trading arm.

The increase was driven by North American institutional investors, whose confidence climbed 13.0 points, to 64.5, the Boston company said on Tuesday. Investors' risk appetite was somewhat more subdued, as shown by a decline of 3.2 points in the European index, to 69.8, and a drop in the Asian index of 2.7 points, to 83.8.

The State Street Investor Confidence Index measures investor confidence on a quantitative basis by analyzing buying and selling patterns of institutional investors.

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