The SEC announced this week its proposal to substantially overhaul the rules regarding alternative trading systems (“ATS”), often referred to as dark pools. The proposed rules would require firms operating ATSs to make additional disclosure about business activities that may present conflicts of interest between firms and ATS subscribers, and considerable information as to how the ATS operates. The proposed rules would also require advance SEC approval of a firm’s ATS disclosures.

In the latest round of regulatory action involving high frequency trading and dark pools, the SEC announced yesterday that it reached a settlement with ITG, Inc., and its affiliate Alternet Securities, Inc., imposing a $20.3 million sanction based on ITG’s misuse of confidential order information to benefit the firm’s proprietary high-frequency trading.