Assets Under Management or AUM is the cumulative market value of all investments managed by a portfolio manager, a mutual fund company or any other such financial institution.

For example, when you invest in a particular mutual fund, there would be other individuals or investors who would put their money into that fund as well. So, when you add all the amount invested in that mutual fund, you arrive at its Assets Under Management. AUM is taken as the yardstick to measure the quantum and success of a fund house.

The AUM is calculated for each and every fund and for each and every fund house as well. So, one can easily check the performance of a fund with its AUM across its peers.

For example, the AUM of a particular fund is mentioned as Assets Under Management= Rs ABC crores (As on Date DD-MM-YYYY)