Knight Capital lost over $460 million in 45 minutes. Its own software did it.
On 1 August 2012 the firm's automated router began firing orders the moment the market opened. The U.S. Securities and Exchange Commission later found that new code, written for a New York Stock Exchange program, had been deployed incorrectly in late July. It triggered a defective function that had sat in the same router since 2005. The router could no longer tell when an order had been filled.
212 customer orders became more than 4 million. More than 397 million shares traded, leaving Knight with several billion dollars of positions it never wanted.
The detail every project lead should read twice: before the open, an internal system sent 97 automated emails that referenced the router and identified an error. The SEC said Knight did not act on them that day.
The penalty was $12 million under the market access rule. Knight settled without admitting or denying the findings.
One-minute true story. AI-generated illustration with narration by an AI voice.
Every go-live has its 97 emails. Who reads yours before the open?
What the captions say
- This is how a trading firm called Knight Capital lost $460 million in 45 minutes. To its own software.
- Nobody hacked it. Nobody stole anything. It started days earlier, with a routine software update.
- Engineers loaded new code into the machine that fires Knight's orders at the market. The install went wrong.
- It woke up an old, broken piece of code, sleeping inside that machine since 2005.
- So on August 1, 2012, at the opening bell, the system could no longer tell when an order had been filled.
- So it sent the order again. And again. And again. For 45 minutes.
- 212 customer orders turned into more than 4 million.
- By the time it stopped: more than 397 million shares traded, several billion dollars of stock it never wanted.
- But here's the part that hurts.
- Before the market opened, Knight's own systems sent 97 automated emails pointing at an error in that exact system.
- The SEC said Knight did not act on them.
- The SEC traced it back to that update. Fine: $12 million, settled without admitting or denying the findings.
- Every big go-live sends its 97 emails. The only question is who is reading them.