Subject: File No. S7-21-09
From: Garth Illingworth, Ph. D.
Affiliation: University of California

September 23, 2009

I strongly support rules that eliminate "flash" or "high frequency" trading. These are market distorting practices that are available to only a few very rich investors. These have no long-term value. I would strongly encourage the SEC to work with State and others to have this practice constrained internationally as well. I hope this move signals the start of efforts by the SEC to minimize market manipulation in its myriad forms and to stay on top of the imaginative approaches by hedge funds and trading groups to enrich themselves at the expense of the broader investment community.