Subject: File No. 10-222
From: bruce leff
Affiliation: professor of medicine

December 26, 2015

Its a no-brainer. IEXs approach to executing trades creates a level playing field for all who execute trades and it clearly the most ethical approach to trading. It is not a surprise that existing exchanges have lined up against IEX, as they fear a loss of revenue from companies that currently pay substantial fees to front-run trades. IEX is acting in the public interest and will promote trust in the securities market. The SEC should absolutely approve IEXs application to become a national securities exchange. To do otherwise will simply show the SEC to be a protector of Wall Streets elite, rather than creating fair markets for all.