How do you find miminum required rate of return?

If you're trying to figure out your minimum rate of return, it's how much money you want to make.

Benjamin Graham's value investing formula used the return rate of US Treasury notes, because if you couldn't make at least the 7% or whatever they returned, you were better off buying those notes, because the US government is very likely to pay you back.

These days, you probably want to earn more than 2%. Remember to calculate the taxes you expect to pay and the rate of inflation, as well as any fees you have to pay for your investment.

I use a return rate of 12% for myself, but I am an aggressive investor.