SHAREHOLDER RIGHTS
Of course, isn't there another factor?
Owners of SSF, instead of the underlying stock (lets use BSC as an example for fun), would not have Shareholder Voting Rights.
So, SSF might also be discounted by the market value of the Shareholder Voting Rights.
Normally, i would agree that this value is non-material, but if there is a possibility of a Corporate Action Shareholder Vote would be announce to take place prior to expiration, then the owner of the SSF could suffer some serious losses on his hedge (eg. BSC).
Am i missing something? (thanx)