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Strategies & Market Trends : MDA - Market Direction Analysis
SPY 652.56-1.5%Nov 20 4:00 PM EST

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To: HairBall who wrote (29658)10/14/1999 4:18:00 PM
From: Ben Antanaitis  Read Replies (1) of 99985
 
LG,

Expiry is the Saturday after the third Friday of each month. Since Options (Open Interest) cannot be traded on Saturday, most people refer to the third Friday as expiration day or expiry day even though it technically is the next day, Saturday.

A new Max-Pain Point&#153 calculation process is initiated after expiry day each month, for the Open Interest that will expire at the next expiry event.

The details of the official calculation are presented here:
ez-pnf.com

Ben A.
ez-pnf.com
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