Notable quotes on exchanges and trading

NEW YORK (Reuters) - The following are some notable quotes from the Reuters Exchanges and Trading Summit, which is bringing together industry heavyweights to take the pulse of the financial sector.

DIRECT EDGE CEO WILLIAM O'BRIEN:

On possible expansion into Europe:

"We're not going to take a lemming-like approach, whereby simply copying the initiatives of our competitors because they look good on a PowerPoint slide."

BATS CEO JOE RATTERMAN:

On raising the speed limit for electronic trading:

"We can't go faster than the speed of light. Everything else is fair game. Everything else is up for grabs."

On oversees expansion:

"Europe is the first real big seed that we planted outside the U.S. and it's the first of many that we have yet to go."