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.

^$26.3

Billion

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

Exchange market share

6^%

Exchange Market Share

This shows IEX’s market share among exchange trading only (not including dark pools and off-exchange trading). This also includes stocks priced under $1, which have a different pricing structure. (As of Q3 2025)

intraday S&P 500 exchange MARKET share

9.1^%

Intraday Exchange Market Share 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 Q3 2025)

Exchange Market Share Growth

>42^%

With overall market share increasing over 32%

(full year 2024 vs. Q3 2025)

displayed quote growth

115^%

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 Q3 2024 to Q3 2025)

Intraday EXCHANGE Market Share

7.49^%

Intraday Exchange Market Share (YTD as of Q3 2025)

Intraday exchange market share includes IEX’s market share among exchange trading only (not including dark pools and off-exchange trading). 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 Q3 2025)

Overall IEX Market Share is 2.8% as of Q3 2025 (Including off-exchange trading). Overall IEX Intraday Market Share is 3.41% as of Q3 2025.
Overall market share includes all U.S. trading both on- and off-exchange venues at all hours of the day. Intraday trading, which refers to trading during regular market hours,
excludes pre- and post-market trading as well as opening and closing auctions. Slightly more equities trading occurs off-exchange than on-exchange. (As of Q3 2025.)