Securities Information Processor (SIP) Latency
The Formal Definition
The microsecond transmission delay that occurs when centralized public market data feeds aggregate and publish the official National Best Bid and Offer (NBBO) compared to direct, proprietary exchange data feeds used by high-frequency market makers.
Latency Gap = Centralized SIP Network Feed (~15-50 microseconds) - Direct Co-Located Fiber Feeds (~1-3 microseconds)
Cole Barrett's Reality Check
The Unvarnished Bottom Line"The SIP is the slow public highway of market data, while institutional algorithms ride their own private optical fiber. By the time the public SIP feed updates your retail screen with a new best bid, high-frequency algorithms using direct exchange feeds have already seen the quote, traded on it, and vanished."
Interactive Simulator: Test the Math
Real-World Example: Scenario Breakdown
Examining the real numbers for: Trading 500 shares of a fast-moving stock during market open price discovery
| Execution Metric | Co-Located Direct Feed Algorithmic Desk | Retail Trader (Public SIP Feed) |
|---|---|---|
| Fee / Rate | Institutional port fee | $0.00 |
| Spread / Buffer | Direct proprietary feeds from NYSE, Nasdaq, and BATS | Relied on consolidated SIP data feed |
| Execution / Status | Saw quote change 35 microseconds before public tape | Order arrived after HFT algorithms cleared the $50.00 liquidity |
| Total Cost / Result | Captured superior price execution via direct feed speed | Suffered $20.00 in microsecond latency drag |
How Brokers Weaponize This Term
Brokers display quotes from the public SIP feed while internal market makers trade against that flow using ultra-fast proprietary direct feeds, exploiting the microsecond latency differential to capture sub-penny spreads.
Broker Evaluation Matrix
Cole Approves
Interactive Brokers: Provides direct market data feed connectivity and unbundled routing options to lit public bourses.
Read Audit →Cole Flags / Avoids
Retail Mobile Apps: Relies on throttled, delayed consolidated feeds, leaving retail orders vulnerable to high-frequency latency arbitrage.
View Trap Details →Frequently Asked Questions
What is the purpose of the Securities Information Processor (SIP)?
To provide a consolidated, fair public record of the best bid, best offer, and latest trades across all US electronic exchanges.
How fast is modern SIP data?
Modern SIP processing latency is typically between 10 and 20 microseconds, but direct exchange feeds operate in the single-digit microsecond and nanosecond range.