There may be changes from time to time in a mutual fund. The mutual funds are required to inform any material changes to their unit-holders. Apart from it, many mutual funds send quarterly newsletters to their investors.
At present, offer documents are required to be revised and updated at least once in two years. In the meantime, new investors are informed about the material changes by way of addendum to the offer document till the time offer document is revised and reprinted
Source :Moneycontrol.com