Subject: File No. 10-222
From: Richard M Grey

February 23, 2016

Dear SEC,

I am concerned about latency arbitrage. In order to prevent latency arbitrage I would like to use IEX.

My broker refuses to let me use the IEX Router. Once IEX is an exchange my broker will allow me to use IEX, therefore, eliminating latency arbitrage.

Thank you,
Richard Grey
Personal Investor