This is what it says in the longmann text book:
Superannuation/Mutual funds
The superannuation and mutual funds recieve funds in the form of savings of people preparing for retirement. The funds gets a steady stream of income from this source over the working life-time of people. The income is then paid to people during the period of their retirement. In order to maximise value of these funds, they are invested by the superannuation fund in equities, debt and property.
I looked in my other text book too and it doesn't even discuss mutual funds, so i think you don't really need to worry about it.
You just need to know that it's part of the financial market.