Figure of the Day

NYSE Volume   4,134,726,000

NASDAQ Volume  2,673,824,433

BATS Volume   1,036,889,262

http://farm3.static.flickr.com/2258/2216324775_725b7d2701.jpg

Over 40 Electronic Communication Networks (ECN) like BATS exist today.  They are generally private markets not available to schmucks like you and I.  When you enter an order there, you are a chumbolone.  These volume figures are from today, March 2, 2010.