Redkite has sold to a leading investment bank, a mid-tier broker and is currently implementing its system at a large New York bank, Edge said.

FORBES: Monitoring Traders Trade: Sell-Side, Buy-Side or Asset Managers

At what was Lehman in Asia, 57% of clients were hedge funds that use the failed broker's high-velocity trading system.

FORBES: Magazine Article

One trader tested Web-based venue The Broker Forum by putting his phone number into the system.

FORBES: Shadow Market Keeps Computer Components Flowing

If not, your broker has to buy shares on the Russian Trading System, Moscow's main stock exchange.

FORBES: Count You In, Comrade?

"It would be premature to jump to the conclusion that all broker-dealers or other potentially important financial firms in our system today should have permanent access, " Paulson said.

FORBES: Paulson Talks Tough

As a broker-dealer, MF Global also added liquidity to the system, adding another layer of systemic risk: on Monday, MF Global traders were barred from the CME Trading floor, substantially limiting liquidity in futures markets.

FORBES: Client Cash Reportedly Missing At MF Global; Debacle May Underline Case For Volcker Rule

The pricing system was first used in an earlier effort, TradeWeb, a broker consortium that lets investors query dealers by computer for prices, await a response and trade.

FORBES: Fear, Greed And Technology

Dan Mathisson of Credit Suisse Securities, which he describes as the largest U.S. broker-dealer by volume traded, the top broker in algorithmic trading, and the largest U.S. alternative trading system, says the proposal as now creates a dangerous situation because it only applies to trading between 9:45 a.m. and 3:45 p.m.

FORBES: Broker-Dealers See Holes In SEC Circuit Breakers

The SEC has already proposed a number of changes designed to address their growing influence, including extra restrictions on broker-dealers that provide direct market access to high frequency traders, a trader tracking system for large traders, circuit breakers that would slow trading in individual stocks if they fall more than 10%, and new rules for off-exchange trading venues.

FORBES: SEC Wants Real Time Trading Data