51.   Brussels has cross-membership ties with Amsterdam and Luxembourg, while Paris and Brussels use the same trading system.

52.   Brazilians jumped in after the Sao Paulo Stock Exchange began offering a home trading system in February.

53.   But industry executives point out that interest from institutions is one engine driving the proliferation of alternative trading systems.

54.   But other executives making the rounds in Bonn came from companies that had already established carbon trading systems in anticipation of eventual required limits.

55.   But the point of admitting China into the WTO is to bring it more fully under the rules of the international trading system.

56.   But, in ways company official are at a loss to explain, glitches keep popping up in the trading system.

57.   But threats are where the conflict usually stops because everyone is deadly afraid of destroying the global trading system.

58.   Campbell said some private trading systems are likely to be apprehensive about the plan because of its potential to undercut their business.

59.   Chicago Board of Trade directors agreed to distribute to its members profits generated by the Project A after-hours trading system.

60.   Chicago officials also said they were planning their own electronic trading system to compete with the International Securities Exchange.