Comment Re:I do not understand why this is a story (Score 1) 740
Trades were executed in Chicago at the same time as the change was announced in Washington D.C. in a classical physics sense.
The trades were made at 2:00pm on the dot in Chicago. Which implies that the trades were made with a 0s thinking/processing time. The graphs I saw were timed down to the millisecond, so assuming they got the information at 2:00.000 (which wasn't possible) they decided to execute the trade in less than 1 millisecond. It's probably theoretically possible, I assume that the information was at least guessable and I'm sure many traders were prepared for this eventuality.
Of course, it's possible someone anticipated the outcome of the decision, and scheduled the trades for 2:00, and was planning to reverse them in some way later if the information tuned out to not be what they had expected.