01/08/2010: OCC Memo #26853CONTRACT ADJUSTMENTS AND THE OPTIONS SYMBOLOGY INITIATIVE (OSI)
01/13/2009: OCC Memo #25361 Changes to Cash Dividend Adjustment Policies - Guidelines - Additional Information - Reminder
07/11/2008: OCC Memo #24624 Changes to Cash Dividend Adjustment Policies - Guidelines - Reminder
04/11/2008: OCC Memo #24289 UPDATE: Contract Adjustment Changes to Eliminate Rounding - Dates for Discontinuation
08/30/2007: OCC Memo #23484 Reminder: Approval Of Proposed Contract Adjustment Changes To Eliminate Rounding
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