The State Street Investor Confidence Index rose to 115.5 in June, its highest level in almost two years.
A seven-point rise since May brought the index, tabulated by State Street Global Markets, to its highest point since a reading of 117.7 for August 2007, said State Street spokeswoman Marie McGehee.
A rise in the index, which is based on actual buying and selling decisions by institutional investors, points to a greater appetite for riskier assets such as equities.
Separately, the New York-based Conference Board on Tuesday said its Consumer Confidence Index declined to 49.3 from 54.8 in May. A State Street news release today noted that consumer confidence typically lags investor confidence by one or two months.