Subject: File No. SR-NYSEArca-2011-90
From: Mike Acerra
Affiliation: Retired engineer

February 10, 2012

I believe that trading is today distorted, if not "rigged" by HFT computers and "quote stuffing", and I want to petition the SEC to require quotes entered to have a minimum time to remain as a standing order.
I believe you MUST look in what is going on because it is a scandal waiting to explode in your face.
Respectfully,

Mike Acerra