Entity Type
Founding Date

The Investors Exchange is a U.S. equities exchange that aligns the interests of the entire trading ecosystem, from investors to brokers to public companies. Its technology is designed to facilitate trading at accurate, up-to-date, and stable prices, resulting in the lowest average effective spread of any U.S. exchange. IEX is known for its deep midpoint liquidity that allows investors to trade in size without moving the price.


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.