BOSTON (AP) — The more informed you are, the better. Yet there’s so much information about mutual funds available, from performance data to legal disclosures, that it’s understandable to wonder what you really need to know.

For the past three weeks, many investors have been able to check out new information that falls into this category. On a fund company’s website, they can click on list of available money-market funds to see daily updates showing tiny changes in the market value of a money fund’s portfolio.