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A new standard
for performance.

IEX is designed to provide superior execution quality,
raising the bar for trading in U.S. equities.

30 Day Average on IEX

Daily Matched Shares

Daily Notional Value

Order types

IEX offers a range of order types that are designed to help Members achieve high-quality performance when trading on the Exchange.

The IEX Signal

The IEX Signal is designed to identify when the quote is unstable and helps IEX protect resting orders.

Trading hours

Orders may be executed on IEX or routed away from IEX during the Pre-Market, Regular Market, and Post-Market Sessions, collectively known as "System Hours". All times are in Eastern Time (“ET”).

Session Start and end times
Begin Order Entry Acceptance 8:00 a.m.
Pre-Market Session 8:00 a.m. - 9:30 a.m.
Regular Market Session 9:30 a.m. - 4:00 p.m.
Post-Market Session 4:00 p.m. - 5:00 p.m.


Holiday 2019 2020 2021
New Years Day Tue Jan 1 Wed Jan 1 Fri Jan 1
Martin Luther King Jr. Day Mon Jan 21 Mon Jan 20 Mon Jan 18
Presidents Day Mon Feb 18 Mon Feb 17 Mon Feb 15
Good Friday Fri Apr 19 Fri Apr 10 Fri Apr 2
Memorial Day Mon May 27 Mon May 25 Mon May 31
Day before Independence Day Wed Jul 3* Fri Jul 3 -
Independence Day Thu Jul 4 - Mon July 5 (observed)
Labor Day Mon Sep 2 Mon Sep 7 Mon Sep 6
Thanksgiving Day Thu Nov 28 Thu Nov 26 Thu Nov 25
Day after Thanksgiving Day Fri Nov 29* Fri Nov 27* Fri Nov 26*
Day before Christmas Tue Dec 24* Thu Dec 24* Fri Dec 24
Christmas Wed Dec 25 Fri Dec 25 -

*Market closes at 1:00 p.m. ET.

Securities eligible for trading

Pursuant to IEX Rule 11.120, Investors Exchange shall designate securities for trading. Any class of securities listed or admitted to unlisted trading privileges on the Exchange shall be eligible to become designated for trading on the Exchange in accordance with the Rules of Chapters 14 and 16.

All securities designated for trading are eligible for odd-lot, round-lot and mixed-lot executions, unless otherwise indicated by the Exchange or limited pursuant to IEX Rules.

See a list of eligible symbols ›

Technology partners

Our Technology Partners include Order Management Systems (OMS), Execution Management Systems (EMS), Datacenter Operators, Network Connectivity Providers, Algorithm and Smart Order Routing Providers, and other software systems providers who connect IEX with our certified Members and other venues.

Within IEX, we have decades of experience collaborating with top-of-class systems providers. Together, we look forward to maintaining a high standard of technological and operational excellence.

Connected service bureaus

Bloomberg SSEOMS
FlexTrade Systems
InfoReach, Inc.
ION Group
Lightspeed Trader
LiquidityBook, LLC
OMEX Systems
Raptor Trading Systems
ROX Systems
SS&C Technologies
Sterling Trading Tech
Takion Technologies, LLC

Market data partners

Market Data Access Feed Handler
ACTIV Financial
Connectivity In a Box (CIB)
Instinet, LLC
NYSE Technologies Connectivity Inc
Redline Trading Solutions
R2G Services
Victory Networks
Vela Trading Systems

Other network, infrastructure, and software technology partners

  • Arista Networks
  • BT Americas
  • CFN Services
  • Connectivity In a Box (CIB)
  • Coverity, Inc.
  • EPAM Systems
  • Equinix
  • GuavaTech, Inc.
  • InfoReach, Inc.
  • IPC Systems, Inc.
  • Kx
  • LaSalle Technology Group LLC
  • Myriad Supply
  • NYSE Technologies Connectivity, Inc. (SFTI Network)
  • Options IT
  • Palo Alto Networks
  • R2G Services
  • Redline Trading Solutions
  • Savvis, a CenturyLink Company
  • Sky Technology Partners
  • Sungard Capital Markets
  • uTrade Solutions
  • Victory Networks


The following broker-dealers are approved members of Investors Exchange.

Abel Noser LLC
ABN Amro Clearing Chicago LLC
TD Prime Services LLC
Allen & Company, LLC
Alpha Trading L.P.
Apex Clearing Corporation
Archipelago Securities, LLC
ATM Execution LLC
Banyan Securities, LLC
Barclays Capital Inc.
Bay Crest Partners LLC
BB&T Securities LLC
Bloomberg Tradebook
Bluefin Trading LLC
BMO Capital Markets Corp
BNY Mellon Capital Markets
BOFAML Securities, Inc.
C&C Trading, LLC
Canaccord Genuity Inc.
Cantor Fitzgerald & Co
Capital Institutional Services, Inc.
CBOE Trading Inc.
CF Global Trading, LLC
Citadel Securities LLC
Citigroup Global Markets Inc.
Clearpool Execution Services, LLC
CLSA Americas, LLC
Coda Markets, Inc.
COR Clearing, LLC
Cornerstone Macro LLC
Cowen and Company, LLC
Cowen Execution Services
Craig-Hallum Capital Group LLC
Credit Suisse Securities USA
Critical Trading, LLC
Cutler Group, LP
D.A. Davidson & Co.
Daiwa Capital Markets America Inc.
Dash Financial LLC
Davenport & Company, LLC
DeMatteo Monness LLC
Deutsche Bank Securities Inc.
Dowling & Partners Securities, LLC
DRW Securities, LLC
E*TRADE Securities LLC
Electronic Transaction Clearing, Inc.
Evercore Group LLC
First Analysis Securities Corporation
FIS Brokerage & Securities Services LLC
Flow Traders U.S. LLC
G1 Execution Services
Global Execution Brokers
Goldman, Sachs and Company
Gordon, Haskett Capital Corp.
Great Pacific Securities
Great Point Capital, LLC
Green Street Trading LLC
GTS Securities, LLC
Guggenheim Securities
Guzman & Company
Hardcastle Trading USA LLC
Hilltop Securities Inc.
HRT Financial LLC
HSBC Securities (USA) Inc.
IEX Services LLC
IMC Chicago LLC
Imperial Capital LLC
Industrial and Commercial Bank of China Financial Services
Instinet, LLC
Interactive Brokers LLC
INTL FCStone Financial Inc.
Invesco Capital Markets, Inc.
ITG Inc.
J. P. Morgan Securities LLC
Jane Street Capital, LLC
Jefferies LLC
JMP Securities LLC
JNK Securities Corporation
Johnson Rice & Company, LLC
Jump Trading LLC
Keefe, Bruyette & Woods, Inc.
KeyBanc Capital Markets Inc.
Latour Trading LLC
Leerink Partners
Lek Securities Corp
Lime Brokerage, LLC
Liquidnet Inc.
Loop Capital Markets LLC
Macquarie Capital (USA) Inc.
Maxim Group, LLC
Meridian Equity Partners
Merrill Lynch Professional Clearing Corp.
Merrill Lynch, Pierce, Fenner & Smith Incorporated
Mirae Asset Securities (USA), Inc.
Mizuho Securities USA Inc.
MKM Partners LLC
Morgan Stanley & Co., LLC
NASDAQ Execution Services, LLC
National Financial Services LLC
Needham & Company, LLC
Northern Trust Securities, Inc.
Northland Securities Inc.
Old Mission Capital LLC
Olivetree Financial, LLC
O'Neil Securities
Penserra Securities LLC
Pershing LLC
Pictet Overseas Inc.
Piper Jaffray & Co.
Quantlab Securities LP
RBC Capital Markets LLC
Redburn (USA) LLC
Robert W. Baird & Co., Inc.
Robotti & Company LLC
Rosenblatt Securities Inc.
Russell Investments Implementation Services, LLC
Sanford C. Bernstein & Co., LLC
Scotia Capital (USA) Inc.
Seaport Global Securities LLC
SG Americas Securities, LLC
Sidoti & Company, LLC
SMBC Nikko Securities America, Inc.
SpeedRoute LLC
Stephens Inc.
Stifel Nicolaus & Co., Inc.
Stuart Frankel & Co. Inc.
Sturdivant & Co., Inc.
Summit Securities Group, LLC
Sun Trading LLC
Susquehanna Financial Group, LLLP
Susquehanna Securities
Telsey Advisory Group, LLC
TFS Derivatives LLC
The Buckingham Research Group Inc.
Themis Trading LLC
TJM Investments LLC
TradeStation Securities, Inc.
TRC Markets LLC
Two Sigma Securities, LLC
UBS Securities LLC
USCA Securities, LLC
Virtu Americas LLC
Virtu Financial BD LLC
Virtu Financial Capital Markets LLC
Wall Street Access
Wedbush Securities
Weeden & Co. L.P
Wells Fargo Securities, LLC
Wolverine Execution Services, LLC
XR Securities LLC