Subject: File No. 10-222
From: Robert Lewkovich

December 14, 2015

Dear SEC,
If the SEC truly intends to implement Reg NMS (as quoted below) and support an un-rigged market then IEX's application should be immediately approved.

"Should the overall efficiency of the NMS defer to the needs of professional traders, many of whom rarely intend to hold a position overnight? Or should the NMS serve the needs of longer-term investors, both large and small, that will benefit substantially from inter market price protection?"
The Reproposing Release emphasized that the NMS must meet the needs of longer-term investors, noting that any other outcome would be contrary to the Exchange Act and its objectives of promoting fair and efficient markets that serve the public interest.

Regards,
John Q. Public