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.
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