Funds spread the risk by investing in large pools of various stocks, that you or I could never afford. Thus if a company that they own, or industry goes out of favor, it only comprises a small segment of total portfolio, and risk is minimized. Likewise if a company is suddenly the "in" thing, the fund may only rise a small amount.
Stocks, on the other hand, will rise and fall with market conditions. You may make a fortune, or lose it.
Bonds are safe instruments in that their interest rate is fixed like in a bank CD. But the actual cost of the bond will rise or fall with interest rates also.