你好，为什么折算的discount rate用单利形式？

NO.PZ2019010402000015问题如下The company enters into a $100,000,000 notionamount 2 × 5 receive-fixeFRA this aanceset, aancesettle The appropriate scount rate for the FRA settlement cash flows is 1.5%. After 60 ys, 90-y Libor is 0.80%, 60-y Libor is 0.7%.If the FRA winitially price1.20%, the payment receiveto settle the 2 × 5 FRA will be:A.100,000B.99,626C.99,800B is correct.考点FRA settlement解析payment receive(1.2%−0.8%)×312×100,000,0001+1.50%×312=99,626.4payment\text{ }receive\frac{(1.2\%-0.8\%)\times\frac3{12}\times100,000,000}{1+1.50\%\times\frac3{12}}=99,626.4payment receive1+1.50%×123​(1.2%−0.8%)×123​×100,000,000​=99,626.4注题目中特别说明了折现率是1.5%，所以直接用1.5%折现，不用90天的LIBOR折现。没有其他补充了，谢谢

NO.PZ2019010402000015问题如下The company enters into a $100,000,000 notionamount 2 × 5 receive-fixeFRA this aanceset, aancesettle The appropriate scount rate for the FRA settlement cash flows is 1.5%. After 60 ys, 90-y Libor is 0.80%, 60-y Libor is 0.7%.If the FRA winitially price1.20%, the payment receiveto settle the 2 × 5 FRA will be:A.100,000B.99,626C.99,800B is correct.考点FRA settlement解析payment receive(1.2%−0.8%)×312×100,000,0001+1.50%×312=99,626.4payment\text{ }receive\frac{(1.2\%-0.8\%)\times\frac3{12}\times100,000,000}{1+1.50\%\times\frac3{12}}=99,626.4payment receive1+1.50%×123​(1.2%−0.8%)×123​×100,000,000​=99,626.4注题目中特别说明了折现率是1.5%，所以直接用1.5%折现，不用90天的LIBOR折现。这题的数给的有问题吧，公式应该是NA×[Lm-FRA0]×tm/（1+×tm），怎么会用1.2%-0.8%，应该用0.8%-1.2%

NO.PZ2019010402000015问题如下The company enters into a $100,000,000 notionamount 2 × 5 receive-fixeFRA this aanceset, aancesettle The appropriate scount rate for the FRA settlement cash flows is 1.5%. After 60 ys, 90-y Libor is 0.80%, 60-y Libor is 0.7%.If the FRA winitially price1.20%, the payment receiveto settle the 2 × 5 FRA will be:A.100,000B.99,626C.99,800B is correct.考点FRA settlement解析payment receive(1.2%−0.8%)×312×100,000,0001+1.50%×312=99,626.4payment\text{ }receive\frac{(1.2\%-0.8\%)\times\frac3{12}\times100,000,000}{1+1.50\%\times\frac3{12}}=99,626.4payment receive1+1.50%×123​(1.2%−0.8%)×123​×100,000,000​=99,626.4注题目中特别说明了折现率是1.5%，所以直接用1.5%折现，不用90天的LIBOR折现。请问这题的头寸怎么看？根据FRA settlement的公式 不是应该当前的利率减FRA么？答案里面用FRA-当前利率

NO.PZ2019010402000015 问题如下 The company enters into a $100,000,000 notionamount 2 × 5 receive-fixeFRA this aanceset, aancesettle The appropriate scount rate for the FRA settlement cash flows is 1.5%. After 60 ys, 90-y Libor is 0.80%, 60-y Libor is 0.7%.If the FRA winitially price1.20%, the payment receiveto settle the 2 × 5 FRA will be: A.100,000 B.99,626 C.99,800 B is correct.考点FRA settlement解析payment receive(1.2%−0.8%)×312×100,000,0001+1.50%×312=99,626.4payment\text{ }receive\frac{(1.2\%-0.8\%)\times\frac3{12}\times100,000,000}{1+1.50\%\times\frac3{12}}=99,626.4payment receive1+1.50%×123​(1.2%−0.8%)×123​×100,000,000​=99,626.4注题目中特别说明了折现率是1.5%，所以直接用1.5%折现，不用90天的LIBOR折现。 因为比较熟悉小t时刻求value时用重新定价法的，但是不太熟悉，settlement的折现，所以想confirm一下，Payment receive是折到贷款合约开始的时刻（即本题t=2时间点）？所以分母折现应该用90/360对吗？

NO.PZ2019010402000015问题如下 The company enters into a $100,000,000 notionamount 2 × 5 receive-fixeFRA this aanceset, aancesettle The appropriate scount rate for the FRA settlement cash flows is 1.5%. After 60 ys, 90-y Libor is 0.80%, 60-y Libor is 0.7%.If the FRA winitially price1.20%, the payment receiveto settle the 2 × 5 FRA will be:A.100,000B.99,626C.99,800B is correct.考点FRA settlement解析payment receive(1.2%−0.8%)×312×100,000,0001+1.50%×312=99,626.4payment\text{ }receive\frac{(1.2\%-0.8\%)\times\frac3{12}\times100,000,000}{1+1.50\%\times\frac3{12}}=99,626.4payment receive1+1.50%×123​(1.2%−0.8%)×123​×100,000,000​=99,626.4注题目中特别说明了折现率是1.5%，所以直接用1.5%折现，不用90天的LIBOR折现。这一题为什么是用1.2%减去0.8%?