刘同学2022-08-23 22:10:01
老师,感觉这里理解起来很牵强啊,positive butterfly =negative butterfly spread?
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hongbo2022-08-24 09:01:31
同学,你好。请参照原版书第3本,第30页
a positive butterfly, which indicates a decrease in the butterfly spread due to an expected rise in short- and long-term yields-to-
maturity combined with a lower medium-term yield-to-maturity. Note that a positive butterfly view indicates a decrease in butterfly spread
Butterfly spread = - Short-term yield+ 2* Medium-term yield - Long-term yield
同学,其实对照这个图和公式,就是可以得出这个结论的。positive butterfly带来的是butterfly spread的下降,而negative butterfly带来的是butterfly spread的上升
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