http://www.bloomberg.com/news/2013-08-16/china-shanghai-composite-surges-as-exchange-said-to-investigate.html State-controlled Chinese brokerage Everbright Securities Co. reported a trading loss of 194 million yuan ($31.7 million) and apologized to investors after errors in order-execution systems sparked. Everbright detected order-generation and execution defects in an arbitrage-trading system.
http://www.bloomberg.com/news/2013-08-18/everbright-reports-loss-after-flawed-trades.html