Inside Wall Street’s Matching Engine: How Exchanges, Auctions, and Order Routers Actually Work

"Inside Wall Street’s Matching Engine: How Exchanges, Auctions, and Order Routers Actually Work"

"Inside Wall Street’s Matching Engine" pulls back the curtain on the most critical yet misunderstood milliseconds in finance. Written for active traders, investors, and curious market observers, this book strips away the jargon to reveal exactly what happens after you press the trade button. If you have ever wondered why your order didn't fill, why the price moved the instant you entered the market, or what actually happens inside the exchange's "black box," this guide explains the hidden mechanics without requiring a degree in computer science.

We take a detailed journey through the order lifecycle, dismantling the limit order book to show how priority rules determine who gets filled first and how algorithms handle high-speed traffic. You will navigate the complex plumbing of the National Market System, from the "Maker-Taker" fee models that drive liquidity to the Smart Order Routers (SORs) that hunt for the best price across fragmented venues. The text also demystifies critical market events, explaining how opening and closing auctions discover fair prices amidst volatility and how market data feeds shape what you see on your screen.

Unlike heavy academic texts, this book relies on clear, conceptual explanations and real-world trading scenarios. By walking through the specific paths of aggressive sweeps and passive limit orders, readers gain a practical edge in understanding where their trades go and how they are treated. Whether you are a retail trader aiming for better ex

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E-bog: 17. december 2025