In my recent post on mutual funds, I noted that John Bogle disrupted that industry with Vanguard, a mutual fund company that specialized in low cost index funds designed to mimic rather than outperform major market indexes. The other mutual fund companies responded with their own index funds, and there is intense competition between them
Mutual fund shares vs. ETFs
Exchange Traded Funds, ETFs, are another refinement of the fund category. They will certainly figure into your reporting on the fund asset class because they are by some measures the most popular of all exchange traded securities.
For my primer on ETFs, see businessjournalism.org.