NO.PZ2018123101000114
问题如下：
Which term structure model can be calibrated to closely fit an observed yield curve?
选项：
A.The Ho–Lee model
The Vasicek model
The Cox–Ingersoll–Ross model
解释：
A is correct. The Ho–Lee model is arbitrage free and can be calibrated to closely match the observed term structure.
能否发一下定义和模型所在的位置。
