Rest. Easy.

IEX is designed to provide execution quality by protecting resting orders.

Trade using custom broker algos View trading documents

IEX plans to support its first IEX-listed company in early 2018.

Order types

We keep it simple. IEX offers five order types, some of which have innovative predictive capabilities that are designed to protect resting orders from trading during unstable, potentially adverse conditions.

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".

Session Start and end times (EST)
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 2017 2018 2019
New Years Day Mon Jan 2 Mon Jan 1 Tue Jan 1
Martin Luther King Jr. Day Mon Jan 16 Mon Jan 15 Mon Jan 21
Washington's Birthday Mon Feb 20 Mon Feb 19 Mon Feb 18
Good Friday Fri Apr 14 Fri Mar 30 Fri Apr 19
Memorial Day Mon May 29 Mon May 28 Mon May 27
Day before Independence Day* Mon Jul 3* Tue Jul 3* Wed Jul 3*
Independence Day Tue Jul 4 Wed Jul 4 Thu Jul 4
Labor Day Mon Sep 4 Mon Sep 3 Mon Sep 2
Thanksgiving Day Thu Nov 23 Thu Nov 22 Thu Nov 28
Day after Thanksgiving Day* Fri Nov 24* Fri Nov 23* Fri Nov 29*
Day before Christmas* - Mon Dec 24* Tue Dec 24*
Christmas Mon Dec 25 Tue Dec 25 Wed Dec 25

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

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 Technologies

Other network, infrastructure, and software technology partners

  • Arista Networks
  • BT Americas
  • CFN Services
  • Connectivity In a Box (CIB)
  • Coverity, Inc.
  • 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 Corp.
ABN Amro Clearing Chicago LLC
Albert Fried & Company, LLC
Allen & Company, LLC
Apex Clearing Corporation
Archipelago Securities, LLC
ATM Execution LLC
Auerbach Grayson and Company LLC
Avondale Partners LLC
B. Riley & Co., LLC
Barclays Capital Inc.
Banyan Securities, LLC
BATS Trading, Inc.
Bay Crest Partners LLC
BB&T Securities LLC
Bloomberg Tradebook
Bluefin Trading LLC
BMO Capital Markets Corp
Brean Capital LLC
Burke & Quick Partners LLC
C&C Trading, LLC
Cabrera Capital Markets, Inc.
Canaccord Genuity Inc.
Cantor Fitzgerald & Co
Capital Institutional Services, Inc.
CF Global Trading, LLC
Chimera Securities LLC
CIMB Securities (USA), Inc.
Citadel Securities LLC
Citigroup Global Markets Inc.
Clearpool Execution Services, LLC
CLSA Americas, LLC
Convergex Execution Solutions LLC
Cornerstone Macro LLC
Cowen and Company, LLC
Craig-Hallum Capital Group LLC
Credit Suisse Securities USA
Cutler Group, LP
D.A. Davidson & Co.
Dash Financial LLC
Davenport & Company, LLC
DeMatteo Monness LLC
Deutsche Bank Securities Inc.
Dowling & Partners Securities, LLC
Electronic Transaction Clearing, Inc.
E*TRADE Securities, LLC
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
GTS Securities, LLC
Guzman & Company -
Hardcastle Trading USA LLC
Hilltop Securities Inc.
HRT Financial LLC
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.
ITG Inc.
J. P. Morgan Securities LLC
Jane Street Capital, LLC
Jefferies Execution Services, Inc.
JMP Securities LLC
Johnson Rice & Company, LLC
Jump Trading LLC
KCG Americas LLC
Keefe, Bruyette & Woods, Inc.
KeyBanc Capital Markets Inc.
Latour Trading LLC
Leerink Partners
Lek Securities Corp
Lightspeed Trading LLC
Lime Brokerage, LLC
Liquidnet Inc.
Macquarie Capital (USA) Inc.
Maxim Group, LLC
Meridian Equity Partners
Merrill Lynch Professional Clearing Corp.
Merrill Lynch, Pierce, Fenner & Smith Incorporated
Mizuho Securities USA LLC
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
RGM Securities, LLC
Robert W. Baird & Co., Inc.
Robotti & Company LLC
Rosenblatt Securities Inc.
Russell Investments Implementation Services, LLC
Sanford C. Bernstein & Co., LLC
Scarsdale Equities 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.
Summit Securities Group, LLC
Sun Trading LLC
Susquehanna Financial Group, LLP
Susquehanna Securities
Telsey Advisory Group, LLC
The Buckingham Research Group Inc.
Themis Trading LLC
TJM Investments LLC
Trade Informatics LLC
Trade Manage Capital, Inc.
TradeStation Securities, Inc.
Tradition Securities and Derivatives Inc.
Triad Securities Corp.
Two Sigma Securities, LLC
UBS Securities 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
Xambala Capital LLC
XR Securities LLC