The American Century International Bond Fund - Y Class (AIBYX) is a mutual fund that primarily invests in international fixed-income securities. This fund aims to provide investors with exposure to a diverse range of global bond markets, including both developed and emerging economies. The Y Class shares of this fund are typically available to institutional investors and have a lower expense ratio compared to other share classes. With a focus on international bonds, this fund offers investors the potential for diversification and income generation.