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You're right ,as expiration approaches the delta of the ATM options go towards 1.0,
otherwise the delta hovers around 0.5 most of the month.
Marcelo
Richard wrote:
> Depends what chunk of time the 5 and 30 minutes represents.
>
> If the options expire tomorrow, then of course 30 minutes will represent a
> fairly significant decay. If the options expire in a month, then it
> shouldn't be much of a factor at all.
>
> I haven't done the math, but I can't see 5 minutes representing much time
> decay at all until the options are extremely close to expiration.
>
> Of course, much depends on how out of the money/in the money the options are.
>
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