DIRXX is a cash management institutional mutual fund offered by Dreyfus that primarily invests in treasury securities. This fund aims to provide investors with a low-risk option for managing their cash holdings while also generating a modest level of return. With a focus on treasury securities, which are backed by the US government, DIRXX offers a high level of stability and liquidity. As an institutional fund, it is designed for larger investors such as corporations, pension funds, and other institutions.