Annuity
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Annuity
(1)Ordinary annuity—— the first cash flow in the series is one period from today. This is the most common form of annuity.
(2)Annuity due—— the first cash flow in the series occurs at the beginning of each period.
(3)Deferred annuity—— the first cash flow in the series occurs beyond one period from today.
(4)Perpetuity—— the series of payments continues indefinitely.

