My son, Conor, sent me this very interesting graphic he found on-line at http://30.media.tumblr.com/tumblr_lvfmtbpiu41qd65vgo1_500.gif
It shows an interesting correlation between Computing Power and Trading Volumes on the NYSE.
Perhaps just a co-incidence, but may not. It makes sense to see that computers have given the Exchanges much more power to handle trades than when they were first organized to operate by people doing trades on paper.
Maybe, however, what we have now is too much of a good thing?