International Securities Exchange, Inc. - ISE Advantage - Market Structure

RELATED LINKS

  Membership Types
  Members
  Rules

Market Structure

ISE's market structure integrates auction market principles into an advanced screen-based trading system.

BIN STRUCTURE

EQUITY AND INDEX OPTIONS

The ISE operates two markets and combined, trades issues representing approximately 99% of options industry volume. The issues are divided into
16 bins.

FX OPTIONS

The ISE operates a seperate market for FX Options. Unlike the equity and index options markets where a bin may contain many options classes, each currency pair is in its own bin.


COMPETING MARKET MAKERS

EQUITY AND INDEX OPTIONS

Each bin is overseen by a Primary Market Maker (PMM). In addition to the PMM, up to 16 Competitive Market Makers (CMMs) supply liquidity in each bin. Most PMMs and CMMs are operated by large, global financial institutions with significant capital base and notable trading experience.

ISE posts the best available bids and offers in each options series. Unlike other exchanges, which display the prices offered by the specialist in the options series, ISE’s posted prices represent the most competitive bid and offer in the entire ISE market.

PMMs and CMMs provide continuous quotations in their bins, and the ISE market displays only the best bid and ask price in each option class. All orders at the ISE (customer, firm, and market maker) receive the same execution privileges."

FX OPTIONS

Each currency pair is overseen by a FX Primary Market Maker (FXPMM) . In addition to the FXPMM, up to 10 FX Competitive Market Makers (FXCMMs) supply liquidity in each pair. Similar to PMMs and CMMs, FX market makers are operated by large financial institutions. FXPMMs and FXCMMs provide continuous quotations in their bins. All orders at the ISE (customer, firm, and market maker) receive the same execution privileges.

ANONYMITY

Trade counter-party information is not visible to anyone in the ISE marketplace, including PMMs. Both parties of a trade receive confirmations without learning the identity of the counter-party. Anonymous trading allows market makers and order-flow providers to post bid and ask quotations at their set prices, free from any influence of other market participants. This anonymity enables pure order executions.