The American Century Strategic Allocation: Aggressive Fund - R5 Class (ASAUX) is a mutual fund that aims to provide aggressive growth by investing in a diverse mix of stocks, bonds, and other securities. It is managed by American Century Investments and is classified as a "strategic allocation" fund, meaning it has the flexibility to adjust its asset allocation based on market conditions. The R5 Class designation indicates that this fund is available to institutional investors and has a lower expense ratio compared to other share classes. Overall, ASAUX is a high-risk, high-potential return option for investors seeking aggressive growth in their portfolio.