ALLIANCEBERNSTEIN CORE OPPORTUNTIES FUND MUTUAL FUNDS USMF - What does ALLIANCEBERNSTEIN CORE OPPORTUNTIES FUND MUTUAL FUNDS USMF mean? - What does ALLIANCEBERNSTEIN CORE OPPORTUNTIES FUND MUTUAL FUNDS USMF stand for? - ALLIANCEBERNSTEIN CORE OPPORTUNTIES FUND MUTUAL FUNDS USMF meaning