Tontina is the name of an early system of raising capital, when people paid into a common fund of money.
In the US, tontines were popular in the 1700s and 1800s and then disappeared in the early 1900s.
Today, tontines are getting a second look as a viable way to secure retirement income.
Tontine investors paid lump sums upon joining and received annual dividend payments.
The shares of the deceased tontine investor have been divided among the surviving members, and the shares of the remaining members increase as more members die.