The $440 Million Software Bug: Knight Capital's 45-Minute Trading Disaster

Knight Capital, once responsible for 10% of US stock trading, lost $440 million in 45 minutes due to a dormant feature flag and a partial server deployment. This video breaks down the technical and operational failures behind the most expensive software bug in history.

■ Background: Knight Capital and the new NYSE program
- Knight's market-making role and SM order router
- NYSE's retail liquidity program and reused Power Peg flag

■ The failure: One server runs old code
- Manual deployment leaves one of eight servers outdated
- Power Peg buys aggressively, executing 4 million trades in 45 minutes

■ Aftermath: $440 million loss and acquisition
- Stock drops 75%, company sold to Getco
- Lesson for software deployment and feature flags

This video is for software engineers, finance professionals, and anyone interested in how small technical oversights can cause massive financial damage. Viewers will learn about the importance of deployment consistency, feature flag hygiene, and operational resilience.