Index funds do, that's pretty much the definition of an index fund.
ETFs are a different concept, but a good index fund will be structured as an ETF, and it looks like this thread is using "ETF" to mean "index fund"? If so, then the answer to your question is an unambiguous yes.
ETFs are a different concept, but a good index fund will be structured as an ETF, and it looks like this thread is using "ETF" to mean "index fund"? If so, then the answer to your question is an unambiguous yes.