Subject: File No. S7-02-10
From: Karim Taleb, Ph.D.
Affiliation: Robust Methods LLC

March 15, 2010

Dear Sir/Madam,

I would like to add my concerns regarding both the flash-trading and sub-pennying practice as potentially undermining the quality and integrity of the financial markets.

I hope that your facts-finding and research effort on such will come up with fair and constructive recommendations.

Karim Taleb