10 Sigma Risk LLC provides consulting services to risk managers and data analysts in the financial industry. Please contact me at email@example.com for a free consultation. The company's name, 10 sigma risk, stands for our focus on extreme market events. If we were to call a normal market volatility level a 1-sigma event, then a 10-sigma event signifies a 10 times greater volatility level, or an extreme event. The market crash of October 2008 following Lehman Brother's bankruptcy was an extreme event. The October 1987 U.S. stock market crash in S&P500 futures was another extreme event.