SEC Speech: Harnessing Tomorrow’s Technology for Today’s Investors and Markets, by Chairman Elisse Walter, on February 19, 2013

High Frequency trading has been in the news (and in class) quite a bit lately.  While high frequency trading seems to have peaked, it is still in the news (For example Warren Buffett sort of talked about it, regulators in the US and Germany are looking into it).   So a short "lesson"

So from Wikipedia:

"High-frequency trading (HFT) is the use of sophisticated technological tools and computer