ISE 250

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The cash-settled proprietary ISE 250 Index (IXZ) tracks the top 250 U.S. stocks trading on NYSE, AMEX and NASDAQ. Companies in the index represent an adjusted market capitalization of about $9 trillion.[1]

Similar to the ISE's other broad-based, pan-industry indexes, ISE 50 Index and ISE 100 Index, the ISE 250 is a capitalization-weighted index. However, it does not include stocks on the basis of market capitalization.

The Index is calculated and maintained by Standard & Poor’s (S&P) based on a methodology developed by ISE in consultation with S&P.

As of Nov. 1, 2007, there are 31 ISE index options listed.

Contract Overview[edit]

Full specifications can be found at the ISE web site.[1]

Index multiplier $100 (e.g., options premiums are multiplied by 100 to obtain the actual premium amount).
Strike price intervals At least $2.50.
Minimum trading increments The minimum trading increment for an options contract trading at less than $3.00 is $0.05. The minimum trading increment for an options contract trading at $3.00 or higher is $0.10.
Expiration Months Up to three near-term months followed by three additional months from the March quarterly cycle (March, June, September and December).
Exercise Style European exercise -- options generally may be exercised only on the last business day before expiration.
Trading hours 9:30 A.M. - 4:15 P.M. Eastern Time (New York time).


  1. 1.0 1.1 Product Details. International Securities Exchange.