End-of-Month S&P 500 (SPX) Index Options
End-of-Month S&P 500 Index Options expire on the last business day of each month. End-of-Month S&P 500 Index Options are PM-settled; that is, their exercise settlement value is based on the closing level of the S&P 500 Index on the day the options expire.
The Standard & Poor's 500 Index is a capitalization-weighted index of 500 stocks from a broad range of industries. The component stocks are weighted according to the total market value of their outstanding "free float" shares.
Up to twelve (12) consecutive End-of-Month contract months may be listed, each expiring in less than one year.
Strike Price Intervals:
No less than 5 points. Strike price intervals shall be the same as standard SPX options.
In-, at- and out-of-the-money strike prices are initially listed. New series are generally added when the underlying trades through the highest or lowest strike price available.
Stated in decimals. One point equals $100. Minimum tick for options trading below 3.00 is 0.05($5.00) and for all other series, 0.10 ($10.00).
European. End-of-Month S&P 500 Index options generally may be exercised only on the expiration date.
The last business day of the expiring contract month.
Last Trading Day:
Trading in End-of-Month S&P 500 Index options will ordinarily cease on the business day on which the options expire.
Settlement of Option Exercise:
End-of-Month S&P 500 Index options are PM-settled. The exercise-settlement value is calculated using the last (closing) reported sales price in the primary market of each component stock on the last business day (the expiration date) of the month. The exercise-settlement amount is equal to the difference between the exercise-settlement value and the exercise price of the option, multiplied by $100. Exercise will result in delivery of cash on the business day following expiration.
As with SPX options, there are no position limits for End-of-Month S&P 500 Index options. However, positions in End-of-Month S&P 500 Index options shall be aggregated with positions in SPX options for the purposes of satisfying the reporting requirements under Interpretation and Policy .03 to Rule 24.4, which, among other things, requires Trading Permit Holders to submit a report to the CBOE whenever they maintain an aggregated position in SPX options in excess of 100,000 contracts. The TPH must report information as to whether such position is hedged and, if so, a description of the hedge employed e.g. stock portfolio current market value, other stock index option positions, stock index futures positions, options on stock index futures; and for customer accounts, provide the account name, account number and tax ID or social security number. Thereafter, if the position is maintained at or above the reporting threshold, a subsequent report is required on Monday following expiration and when any change to the hedge results in the position being either unhedged or only partially hedged. Reductions below these thresholds do not need to be reported.
Margins would match those of standard options on the S&P 500 Index. Uncovered writers must deposit 100% of the option proceeds plus 15% of the aggregate contract value (current index level multiplied by $100) minus the amount by which the option is out-of-the-money, if any. Minimum margin is 100% of the option proceeds plus 10% of the aggregate contract value. Long puts or calls must be paid for in full.
Extended Hours: 2:00 a.m. to 8:15 a.m. Central time (Chicago time)
Regular Hours: 8:30 to 3:15 p.m. Central time; except that on their expiration date, expiring End-of-Month S&P 500 Index options close trading at 3:00 p.m. Central time. All non-expiring End-of-Month S&P 500 Index options will continue to trade until 3:15 p.m. Central time.