How can i mutual fund data?

are there any free/public data feeds that provide mutual fund data?

Try morningstar...
Don't use the rating system as that really is done for morons.
Look at alpha, beta, and sharpe ratio. Consider style, style drift, and manager tenure.
Put simply:
Alpha is the return above the risk level associated with the fund's movements.
Beta is the relationship of change to the overall market.
Sharpe is another measure of risk.
Style drift is how much, often does the fund move from one type of style (mid cap value) to another (mid cap growth).
Manager tenure is important ... if the manager is new then you may not be able to depend upon the numbers/returns over the last few years.

I'm assume you mean " How can I find mutual fund data?"
Im not a big mutual fund person. They were my biggest losers of all my investment. They underpeform the market and what every thinks, they can lose vaule and your money. Just look at the earlier 2000's when some funds lost over half of their vaule. Some of these funds never recovered and some were consolidated into other funds. If you do decide to be a mutual fund person and go the lazy route, start looking at what they investing in. You can do the same exact thing, but you have a bigger return.

Morning Star has elaborate tables, but the most convenient way is to look at the back pages of financial magazines where they publish performance tables over several years.

It is true that some mutual funds had big falls in about 2000 but the shares of some companies did far worse.

People always advise you to research companies before investing in them, and not to put all your eggs in one basket. Well, MFs do that for you much better, as they have professional managers. But still, the vast majority do not beat the index, and over a long period they take a very hefty slice of the fund value. For example, a fund having a front load 3%, annual charges of 1.25% and growing at 7% pa, will take 14% of its value after 10 years and 41% after 40 years.