Posts in faq

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Vendor Display Rule

Broker-dealers need to use full SIP data on screens where trades can be implemented. FINRA may impose fines if the Vendor Display Rule isn't followed.

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Understanding Aggregate Bar Delays

Sometimes users reach out to us confused about why they receive an aggregate bar late or twice through our WebSocket feed. This behavior is intentional and designed for quality assurance purposes on our end, here’s why: Trades are occasionally sent to us late. FINRA, for example, has up to 15 minutes to report a trade that happened on any of the dark pools. We deal with these delayed trades differently for second and minute aggregates. Second Aggregation: For sec

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Understanding the SIPs

At the core of the securities markets in the U.S. lies the Securities Information Processors (the “SIPs”). The history of SIPs goes back to 1975 when Congress established the concept as part of its 1975 amendments to the Securities Exchange Act of 1934 (the “Exchange Act”) to help establish a national market system for the trading of securities. The SIPs essentially link the U.S. markets by processing and consolidating all bid/ask quotes and trades from every exchange (i.e., core data) into one

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Understanding Professional Status

U.S. stock exchanges like NYSE, Nasdaq, and others require data vendors such as us to collect and maintain personal information and employment information for some of our Stock API data recipients. The fees for the market data that are assessed to data vendors depends on how individual subscribers classify themselves as either Non-Professional Subscribers or Professional Subscribers, as defined below. Per exchange policies, you are considered a Professional Subscriber until you are qualified as