The State Street Investor Confidence Index rose by 8.7 points in February to post a reading of 123.

The index is compiled by  State Street Global Exchange, a unit of State Street Corp., the Boston-based financial services company.

The index measures investor confidence or risk appetite quantitatively by analyzing the actual buying and selling patterns of institutional investors. A reading of 100 is neutral for the index

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“Weaker US economic data and troubles in emerging markets sparked a dramatic correction in global equities in late January and early February, but longer-term investors did not panic”  Michael Metcalfe, senior vice president and head of multi-asset strategy at State Street Global Markets, said in a statement. “Instead, they used the sell-off in risk assets as a buying opportunity and measured investor sentiment rose in all regions bar Europe.”