June 19 (Bloomberg) -- U.S. Securities and Exchange Commission Chairman Mary Schapiro, concerned that trading on private electronic markets may pose “emerging risks,” said the agency may require firms to disclose more information on their transactions. If trading systems known as “dark pools” expand substantially, they may “prompt speculation and suspicion” about price fluctuations because they don’t provide enough transparency, Schapiro said in speech yesterday in New York. Traders with access to the private markets’ pending orders also may gain an unfair advantage, she said.
