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»Forums Index »Archive (2017 and earlier) »Data and Content Support »Inconsistent Option Naming For 'Last Trading Day' and For 'Day of Expiry'
Author Topic: Inconsistent Option Naming For 'Last Trading Day' and For 'Day of Expiry' (2 messages, Page 1 of 1)

stargrazer
-DTN Guru-
Posts: 302
Joined: Jun 13, 2005

Right Here & Now

Posted: Feb 5, 2012 11:20 AM          Msg. 1 of 2
The symbol GLD has options available to it. Option naming doesn't appear to be consistent. For example, for a 2012/02/10 expiry for a GLD call is 'GLD1210B167'. 120210 is a Friday. On the other hand, for GLD option dated 120518, the option actually has a Saturday date: 'GLD1219E86'. Is there a method to this madness? I see IB has similar dating, so I believe it is official, but why?

Thank you.

DTN_ToddH
-DTN Guru-
Posts: 287
Joined: Oct 6, 2011
Posted: Feb 6, 2012 08:57 AM          Msg. 2 of 2
Hello Stargrazer,

The confusion is understandable.
The GLC option that expires on Feb. 10 is a weekly option.
The GLC options that expire on 2-18, 3-17, 4-21, and 5-19 are the monthly options
and their expiration rule is: Saturday immediately following the third Friday of the expiration month.

Here is a CBOE web site that tells more:
http://www.cboe.com/Products/OptionsOnETFs.aspx#etfspec

Thanks for the question.
 

 

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