EDUCATIONAL NEWS UPDATES DATE:-13/11/2017. 

money market funds did experience losses after the share price of these funds, typically pegged at $1, fell below that level and broke the buck. Income funds are named for their purpose: to provide current income on a steady basis. These funds invest primarily in government and high-quality corporate debt, holding these bonds until maturity in order to provide interest streams. While fund holdings may appreciate in value, the primary objective of these funds is to provide a steady cash flow​ to investors.
As such, the audience for these funds consists of conservative investors and retirees.

Because they produce regular income, tax conscious investors may want to avoid these funds Very Useful For Mutual Funds.