Old news but still pure gold:
"According to an official statement by Huobi, an initial loss of 2,500 BTC was the result of an individual trader who on 14th November opened a highly leveraged long position of 40m CNY(6,5mio USD) at a BTC price of
3,000 CNY, only to be forced into liquidation at a lower price (2817.76) when the market took a sharp dive.
Even the forced liquidation price was unattainable, however, since the price at the time was falling fast. The trader's position could only be fully closed at a price averaging
2378.72 CNY, resulting in the system loss. In total, BitVC's futures contract system lost 3032.3848 BTC over the week."
http://www.coindesk.com/huobis-bitvc-takes-trader-profit-cover-1-million-loss/Has the Huobi CEO himself been the mysterious trader? That whole story sounds "strange", especially the opening and closing price.