payment是你要付的钱，就是cost
payoff是指你的收益，就是profit

i am here to 灌水~

那payout怎么讲？ 2# ringthomas0000

payoff和profit不一样。

比如long call 的payoff是max(S-X,0)
profit是max(S-X,0)-call premium

看到payoff在MBS部分还有一种意思——全部清偿
Payoff: Payment in full of a loan at or before maturity.

payout  
nvestopedia Says:
In terms of financial securities like annuities and dividends, payouts refer to the amounts received at given points in time. For example, in the case of an annuity, payouts are made to the annuitant at regular intervals such as monthly or quarterly. With dividends, payouts are made by corporations to their investors and can be in the form of cash dividends or stock dividends.