The gross value of the fund is required to double in value every five years. Should you fail to achieve these growth targets in any future year, you will be required to repay all of the money you have taken in income payments up to that date. You have to agree at the outset that you will repay these funds in full if you fail to meet the future growth targets. That is, you will not be able to declare bankruptcy to avoid this repayment obligation. I am referring to mutual funds.
Mutual funds are a compilation of many different investments.
Companies take different investors and collect them into one group, so there is more group power and loss absorption. It doesn't have a maturity date, so then I could reinvest my gains to the same fund and continue to make money, hypothetically. This the total for the beginning of the next year. As you can see, the fund more than doubles by five years. Of course, this is not an exact number, as the stock funds change everyday.