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STA welcomes the opportunity to comment on the Plan to Address Extraordinary Market Volatility (the “Plan”) Submitted to the Securities and Exchange Commission (“Commission”) Pursuant to Rule 608 of Regulation NMS Under the Securities Exchange Act of 1934 (“Exchange Act”) by various self-regulatory organizations (“SROs”). Over the course of our seventy-seven year history, the Security Traders Association (“STA”) has written comment letters and special reports on market structure issues. This library of material provides STA a historical perspective on market structure and serves as a vital resource when formulating opinions on current issues.

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