Subject: File No. S7-10-10
From: Jonathan D. London

May 25, 2010

I think that the proposal is a step in the right direction. I question to what extent the proposed rule will have on dark pools. I have recently placed orders where my bid on an AMEX listed equity, was higher than executed trade. The reason my orders were not filled according to the execution desk at my broker dealer was that the trades were executed in a dark pool. If the exchanges and exchange rules are meaningless to daily trading, how will these rules be enforced? Enforcement of rules seems to be one of the biggest issues in the past few years with the SEC, and with the majority of trades being executed electronically it shouldn't be a problem to track every single trade.