“The difference between a fixed-for-floating swap and a series of forward contracts is that all the fixed-rate payments in a swap are equal. A swap can be replicated by a series of forward contracts that expire on each of the swap’s payment dates, but the fixed rates on these forward contracts are not necessarily equal.”

“ However, there is one important difference. Because the forward contract rates are all equal in the FRAs that are equivalent to the swap, these would not be zero value forward contracts at the initiation of the swap.”  出自note

疑问：fixed rate on forward contract不就是 forward contract rate嘛，那为何两句红色部分矛盾？还是我理解错了

Consider a one-year swap with quarterly payments, one party paying a fixed rate and the other a floating rate of 90-day Libor. At each payment date the difference between the swap fixed rate and Libor (for the prior 90 days) is paid to the party that owes the least, that is, a net payment is made from one party to the other.
We can separate these payments into a known payment and three unknown payments which are equivalent to the payments on three forward rate agreements.

疑问：分成90days from now based on 90-day libor的FRA, 180days 90-day LIBOR FRA-2,270 days 90-day LIBOR FRA 3, 360days 90-day LIbor FRA.

那为何第一次payment是known呢？