Market Data

Alpaca provides you with different market data depending upon your account type. Below is a summary of the data feeds available. Currently, we only provide data for U.S. listed equities.

IEX Data

This is available to all Alpaca users

Users that have signed up with Alpaca but have not opened a real money brokerage account are able to receive free real-time data from IEX. Please note that this data feed only includes quotes and trades occurring on the IEX (one of the U.S. stock exchanges) order book.

Consolidated Market Data

This is available only to Alpaca Brokerage Accounts (Alpaca Securities brokerage account customers, currently U.S. residents only)

Alpaca Securities brokerage account customers are provided with a consolidated U.S. equity market data feed. Currently we provide this data for free.

Consolidated stock market data is an aggregated reporting of all securities exchanges’ and alternative trading venues’ quote and trade data. It is the most relied upon type of market data, providing investors and traders globally with a unified view of U.S. stock market prices and volumes. It also underpins the National Best Bid and Offer (NBBO), which provides investors with a continuous view of the best available displayed buy and sell prices, and through Rule 611 ensures that investors receive the best available displayed prices on their trades, with a few exceptions.

Our Data Provider and Terms of Usage

Consolidated market data is provided by third-party data vendor Polygon. Please note that this data is currently only available to customers who affirm their Non-Professional Subscriber status. During the account opening process, customers are directed through the data agreement, which is an agreement between the customer and Polygon.

Further Reading

For more information about market data feeds, please see our Medium post.


Suggestions or questions?
We're always happy to hear from you. You can contribute to these docs on GitHub, or you can join our Community Slack to get help from other community members and the Alpaca team.