SAN FRANCISCO (MarketWatch) -- Nasdaq OMX Group Inc. NDAQ, +0.25% said Thursday it will stop offering "flash order types" beginnning Sept. 1. On Wednesday, Securities and Exchange Commission Chairman Mary Schapiro said the agency is moving in the direction to ban so-called flash trading, where high-frequency traders can get information just before it becomes public. "We recognize the SEC's rulemaking process will take time, yet as an exchange we have the ability to move on our own," Nasdaq said in a statement. "We respectfully call on other markets offering similar functionality to make the same decision."