The article stated that as much as 600 million USD in trades were made in that 7ms window. The S&P 500 rose 1.2% as a result of the announcement, giving an esse

The article stated that as much as 600 million USD in trades were made in that 7ms window. The S&P 500 rose 1.2% as a result of the announcement, giving an essentially riskless gross profit of around 7.2 million USD, if one were to buy before and sell after.