amount or expires worthless. References herein to index values "as initially reported" refer to the values initially reported by the source of the Index as definitive, and not to any tentative or preliminary values that may be announced at an earlier time subject to adjustment. In extraordinary circumstances (e.g., where an exercise settlement value as initially reported is obviously wrong and inconsistent with values previously reported. and a corrected value is promptly announced), OCC has dis- cretion to direct that exercise settlements be based on a corrected exercise settlement value. Ordinarily. however, the exercise settlement value as initially reported by the official source of the Index will be conclusive for exercise settlement purposes. The paragraphs numbered 7 and 8 beginning on page 77 of the Booklet are replaced with the following paragraphs: 7. Cash-settled index options whose exercise settlement values are based on the opening prices of the constituent securities are not traded on the last sched- uled trading day for those securities prior to the option expiration date. An option holder will be able to realize value from his option on that day only if the option is in the money and is exercised. A writer of this type of option who has not previously closed out his position will be unable to do so on that last trading day for the constitu- ent securities and will be at risk of being assigned an exercise. 8. Current Index levels will ordinarily continue to be reported even when trading is delayed or interrupted in some or all of the constituent securities of the index or when the reporting of transactions in those securities has been delayed. In that event, the reported index levels will be based on the most recent reported prices of the con- stituent securities — whether or not those securities are being currently traded. As a result. reported index levels may at times be based on non-current price information with