Lightning halted two American Stock Exchange, a voluntary trading

 British American Stock Exchange, there are two was announced Thursday, will be from September 1 this year, the initiative to stop the operation.
BATS Trading NASDAQ OMX and the decision announced only a few days ago, the U.S. Securities and Fair (SEC) Chairman Mary b Shapiro (Mary Schapiro) suggested that the SEC will suppress the lightning deal, because it made some investors into law disadvantages.
3 years ago, the first to launch lightning transactions, and thus expand securities transactions in Direct Edge Exchange market share, declined to whether to change its trade policy to comment on lightning.
the New York Stock Exchange - Euronext (NYSE Euronext) is the only flash instruction does not provide major exchanges.
flash command lets traders use ultra high-speed computer, the first in the open market before the fraction of a second, a glimpse of the state of the stock instruction stream.
Some traders followed the command ; to certain exchange members, which can make them relative to other market participants to obtain an unfair advantage. Although the Lightning transactions represent only a small part of the transaction, but the operation has been under intense scrutiny.
SEC Fair is drafting proposals to enable the traders can not send flash orders. The proposal would need to be unanimously adopted by the Commission 5, also need to listen to public views.
SEC spokesman said that although the provisions of still allows for lightning deal, but Shapiro rule-making process will take time. but as an exchange, we have the ability to act independently. We call on other markets that provide similar functionality to make the same decision. Trading, said, Mackenzie, Joanna Chung in New York 2009-08-07
Two of the three US equity exchanges that allow traders to use flash orders said on Thursday they would voluntarily end the practice at the start of-September.
The announcements by Nasdaq OMX and BATS Trading came only days after Mary Schapiro, chairman of the Securities and Exchange Commission, signalled that the SEC would clamp down on flash trading amid concerns it puts some investors at a disadvantage.
Direct Edge, the exchange that pioneered flash trading three years ago and gained market share in equity trading as a result, declined to comment on whether it would change its policy on the practice.
The only leading exchange that does not offer flash orders is NYSE Euronext.
Flash orders involve allowing traders with lightning-fast computers to gain a glimpse of share order flows a fraction of a second before the broader-market.
Some then unfair advantage over other market participants. While flash comprises a small share of overall trading, the practice has come under intense scrutiny.
The SEC is drawing up proposals that would eliminate the ability to flash orders. The proposals would need to be approved by the full five-member commission and be open to public comment.
An SEC spokesman said that while current rules still allow flash trading, Ms Schapiro Nasdaq OMX said: br> BATS Trading, which last month called for an end to flash trading, said it was