IEX Facts

2012

IEX

IEX was founded.

Jun

2016

IEX Exchange

IEX became a national securities exchange.

AUG

2020

D-Limit

The SEC unanimously approved IEX's Discretionary (D-Limit) Order Type.

JAN

2025

IEX Options

IEX filed for its IEX Options exchange with the Securities and Exchange Commission.

^$24.8

Billion

Daily traded volume on IEX (more volume than the London Stock Exchange, Deutsche Börse, and TMX Group.)

Exchange market share

5.6^%

Exchange Market Share

This shows IEX’s market share among exchange trading only (not including dark pools and off-exchange trading, where exchanges don’t compete). This also includes stocks priced under $1, which have a different pricing structure and for which IEX does not primarily compete. (As of H1 2025)

S&P 500 volume share

9.0^%

Intraday Exchange Market Volume for S&P 500 Names

This statistic looks at on-exchange trading in the S&P 500 (the preeminent index of U.S. Large Capitilization stocks) during regular market hours. Intraday trading, which refers to trading during regular market hours, excludes pre- and post-market trading as well as opening and closing auctions. (As of H1 2025)

Market Share Growth

>50^%↑

In IEX market share year-over-year, with exchange market share increasing over 60% year-over-year

(From Q2 2024 to Q2 2025)

displayed quote growth

>150^%↑

In IEX's displayed quote presence year-over-year

Displayed quote presence measures what percent of the day IEX is on both sides of the National Best Bid and Offer, a key measure of liquidity. (From Q2 2024 to Q2 2025)

Market Share

2.6^%

Overall Market Share (Including Off-Exchange Trading)

Overall market share includes all U.S. trading both on and off-exchange venues at all hours of the day. Slightly more equities trading occurs off-exchange than on-exchange. (As of H1 2025)