<prompt> Human: Ive read a couple of books about 401ks recently and the message that both seem to espouse is that index funds are a better option in the long term 10 years than actively managed mutual funds. I read a bunch of online articles and they tend to agree as well. They cite the fees and taxes associated with actively managed funds as the biggest inhibitor of SP beating returns for mutual funds.Im thinking of retooling my 401k to match this logic. Does anyone else see a reason not to or have another opinion on the matter? Id like to hear the argument from the other side.Edit: reworded for clarity  <response>: My 401k is exclusively comprised for index bond funds. So, no, I dont think its a bad idea. 