Long payer swaption: long option to long volatility (预期volatility上升)
Short payer swaption: short option to short volatlity (预期volatility下降或者不变)
Long receiver swaption: long option to long volatility (预期volatility上升)
Short receiver swaption: short option to short volatlity (预期volatility下降或者不变)
理解对吗？多谢！
