Book excerpt: "This book accounts the terrifying hours following Knight Capital's August 1, 2012 trading debacle, with news-breaking research regarding the firm's 17 years of tumultuous existence as an independent company. Knightmare on Wall Street is the definitive behind-the-scenes story of Knight Capital. The firm, founded by Kenneth Pasternak and Walter Raquet in 1995, had seen its fortunes change as U.S. regulators made a series of changes in the structure of financial markets and computers were progressively expanding their share of trading. The Flash Crash, the infamous 1,000 point drop of the DJIA on May 6, 2010 (the largest one-day point decline in history), illustrated how market structure problems could almost instantaneously cascade from one market participant to the rest. This book provides a fascinating account of what it took to elevate the firm to the cusp of the retail investing revolution of the late 1990s, to struggle through booms and busts, and to bring the firm down, to end up ultimately being ignominiously bought up by a competitor."--Extracted from Edgar Perez website.