So spot rate is for immediate delivery and forward rate is for delivery later.
所以即期汇率就是在即期交易时的汇率，而后者就是在期货交易付的汇率。
The swap rate is the margin between the forward exchange rate and the spot rate.
期率是指远期交易率和即期交易率之间的差额。
If the forward rate is on the same level as the spot rate, they are known as at par.
如果远期汇率低于即期汇率，其差额叫做贴水。如果远期汇率等于即期汇率，叫做平价。
If the forward rate is on the same level as the spot rate, they are known as at par.
如果远期汇率低于即期汇率，其差额叫做贴水。如果远期汇率等于即期汇率，叫做平价。
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