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Large Options Positions Reporting

In June 2008, the Options Clearing Corporation ("OCC") and their participant exchanges began the implementation of the Option Symbology Initiative ("OSI"). By February 12, 2010, all exchange traded options are expected to be described using explicit data elements instead of the current OPRA codes, which can be up to five characters long. Post-OSI, members must be able to support explicit options identifiers that will require a change to existing Large Options Positions Reporting (LOPR) layouts.

In preparation for the January 2010 cut-over to the new LOPR system, OCC will begin collecting and disseminating LOPR data in the 4th quarter of 2009 . The new LOPR report will differ significantly from the current fixed field length report. A link to the OCC guide for the new LOPR record layouts, a detailed explanation of fields and mapping of OCC fields to current SIAC fields can be found below. Additionally, links to an overview for SIFMA and a list of Frequently Asked Questions are included.

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