老师 计算器在算日期的时候如何清零

为什么下面的公式收益率和波动率都没有平方了

老师，仓储成本贴现为什么用连续复利而不用一般复利？

为什么interest-only strip的duration为负而principal-only stripduration为正？

这道题的分位点计算出来是1.64，对应的概率是查哪个表得出来的呀？Z-table？还是那几个特殊需要背下来的分位点对应的概率数值？如果是特殊分位点对应的数值，1.645≈1.65，距离均值1.65个标准差，对应的应该是90%的概率啊！应该选择10%才对啊！

请问credit spreads are flat 这个怎么翻译，谢谢

eff is an arbitrage trader, and he wants to calculate the implied dividend yield on a stock while looking at the over-the-counter price of a 5-year put and call (both European-style) on that same stock. He has the following data: *Initial stock price = USD 85 *Strike price = USD 90 *Continuous risk-free rate = 5% *Underlying stock volatility = unknown *Call price = USD 10 *Put price = USD 15 What is the continuous implied dividend yield of that stock? A 7.71% B 5.34% C 4.69% D 2.48% 为什么实在85上折现，不用90

老师 C阶乘 金融计算器怎么按？

对callable bond，如果是发行方，他的var会变小吧，对持有人来说var才变大。。是不是这样的呀老师

请问，P0的值是102.88如何算出？