对于put option有这样一段话：
{ The risk is that the asset's value will appreciate at a rate greater
than the riskless rate
{ Early exercise is attractive if
* The more `in the money' the put is
* The
对于put option有这样一段话：
{ The risk is that the asset's value will appreciate at a rate greater
than the riskless rate
{ Early exercise is attractive if
* The more `in the money' the put is
* The
