Lead-up to monthly option expiry

[Caesar]

I've sometimes noticed that in the lead up to the expiry of monthly options, there is a stonger movement (usually in an upward direction) towards the expiry day. Once expiry has passed, the movement does n't seem to be as strong.

I have n't done a scientific study on this, but it does seem to occur more often than not. But I'm willing to be corrected.

If true, it implies manipulation of the indices, but also presents a trading opportunity.

Anyone have any thoughts ?

 

[hobby]

Concur.

I'd add to this.....

First trading day of the month & at the moment, Mon thru Fridays as days when the mkts tend to rise.