Carl Levin actually said...

"New technologies should not erase enduring values. Financial markets cannot survive on technology alone."

"But the answer to the question is different brokers, even with the same clients, can reach different conclusions about the best venue."

"Who decides whether an exchange or a wholesaler has provided best execution?"

"Many, including this Senator, question whether the rise of high-speed trading is, overall, a good thing for markets and investors."