minutes, rather than spreading the sell orders out over a much longer time period". This claim was later addressed by the Chicago Mercantile Exchange, not mentioning any "accident" and implying the program was a methodical hedge whose execution generated "less than 9% of the volume during the" twenty minutes. On December 7, 2016, multiple buyers purchased around 16,000 E-mini S&P 500, in what was described as a series of stop orders triggered by a single contract trading at 2225.00. The contracts traded as stops, traded "all ... at the same nanosecond", were valued at $1.8 billion. The sequence of trades at new highs was prelude to a sharp market rally for the balance of the day and the two succeeding days. It was the biggest E-mini trade by more than a factor of two in 2016 and attracted comparison to the 2010 flash-crash trade. See also E-mini NASDAQ futures Futures contract Performance bond References External links E-mini S&P 500 Futures: CME description Quotes, E-mini S&P 500 Futures, CME Derivatives (finance)