case, the exercise settlement value of the options would become fixed based upon the last published value for the index, and the market on which the options we traded may determine to accelerate the expiration date for the options (and, in the case of European-style options, their exercisabillty). The expiration date will ordinarily be accelerated to fall on the next standard expiration date for options as specified in OCC's rules or on such other date as OCC establishes in consultation with the market on which the options are traded. All options that are not in the money will become worthless and all that are in the money will have no time value. Holders of an in-the-money option whose expiration date is accelerated must be prepared to exercise that option prior to the accelerated exercise cut-on time in order to prevent the option from expiring unexercised. Writers of European-style options whose expiration date is subject to being accelerated bear the risk that, in the event of such an acceleration, they may be assigned an exercise notice and be required to perform their obligations as writers prior to the original expiration date. As with any other option for which the expration date is accelerated. no adjustment would be made to compensate for the accelerated expiration date of a relative performance option. 10. The caption "Stock Indexes, Variability Indexes, Strategy-Based Indexes and Dividend Indexes," as It appears in the December 2009 Supplement as the heading of the section immedAstely preceding the section captioned 'features of Index Options" beginning on page 28 of the Booklet, is replaced by the new caption "Information Concerning Underlying Indexes." 11. The first paragraph appearing under the caption "Features of Index Options" on page 28 of the Booklet, as amended by the June 2008 Supplement, is replaced by Me following: All index options that are traded on the date of this booklet are cash-settled. Cash-settled