<prompt> Human: So I received an email saying changes were made to my account, so naturally I freaked out thinking someone had gotten into my account. Instead, they decided to convert my Index Fund in to Admiral Shares. Can they do that without asking me? Did it happen to anyone else?Assistant: They go through and upgrade shares in accounts with sufficient balances automatically once or twice a year. Yes they are allowed to do that. You should be glad they did - it now costs you less to invest your money.Human: The fee is lower, but the fund hasnt done as well historically as the one I was in, which is why I didnt convert them myself.  <response>: the fund hasnt done as well historically as the one I was inPast performance isnt indicative of future funds, and the discrepancy is almost certainly because the Admiral Shares fund has a different date of inception. 