Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

What are stock indexed funds and how do they lower taxes?
who computes the S&P 500? Standard and Poor's. Why are they sharing this information and Because that's what they do. This is a financial research company. how do they recuperate the costs inherent in computing the S&P 500? By charging clients for other information. The computing of the index itself is not all that complicated, its coming up with the index that's a problem. Once they've come up with the formula, and it became widely accepted, the computation itself is not an issue. But the fact that its so popular leads to the S&P brand recognition, and people come and pay good money for their other services (ratings and financial analysis of securities). They do more work for free. For example, the ratings of various government debts are being done by S&P for free (governments don't pay for that), while private bonds are rated for a fee (corporations pay to have their bonds rated). Also, as noted by JBKing, there are probably some licensing fees for using the index name in the fund name (and other users are probably paying the licensing fee, like the news agencies and the exchanges). S&P500 is a registered trademark, and as such cannot be used without the owner's permission. Why is then "active management" not required for indexed funds Because no research and stock picking is required. In fact, these funds don't really require a manager, they can be managed by a simple script. and how does it lower taxes? (perhaps this could be a different   question if this has become too broad) Actively managed funds perform a lot more buy/sell operations, each leading to tax consequences to the fund (which rolls them over to the investors). Index funds only buy and sell to re-balance back to the index (or when the makeup of the index changes, usually once a year or half a year), leading to much lesser realized capital gains to the fund, thus much lesser tax consequences.