The Security Traders Association (“STA”)1 commends the Securities and Exchange Commission (“SEC”, or “Commission”) on its focus on ensuring that the U.S. equity markets remain the strongest in the world. The STA commends the Commission’s deliberate, data-driven process for reviewing equity market structure, given the many inter-related issues and the potential for significant market structure consequences (positive or negative) that may occur with any rule adjustments. The SEC market structure website stands out as an exemplary effort by the Commission to promote a better understanding of the markets through the use of data, analytics and research. The website also commendably includes an opportunity for feedback, which is essential for transparency and further analysis of the data.