The weekly total was more than half the average monthly volume for the year.
About 5.7 million shares changed hands, more than five times the recent average volume of trading.
"We want the capacity to handle five times our average daily volume," he said.
This year, average daily volume has been 520 million shares.
Yesterday, 4.5 million shares changed hands compared with average daily volume of 145,600.
Almost 7.7 million shares changed hands, more than twice the average daily volume for the previous six months.
By comparison, the average daily volume for the same period in the previous three years was 25 percent lower.
I think they have to be the same average overall volume now.
In 1986, average monthly volume was slightly more than $200 million.
Through the week ended May 10, the average daily volume of energy contracts was up 40 percent from a year ago.
