The ISE plans to list and trade 600 stock options, which are divided into ten groups of approximately 60 stock options each. Market makers will be assigned to provide liquidity in each group.

     ISE has three classifications of members, all of whom are registered broker/dealers.

• 10 Primary Market Makers (PMM)
• 100 Competitive Market Makers (CMM)
• Unlimited number of broker/dealers who will be Electronic Access Members (EAM)

     In the ISE system, floor brokers are not needed since orders are input by broker/dealers directly to the point-of-sale (electronic order book).