Fitting End To 2009 Trading: Big Volume Sell Off

It was only fitting that a year marked by irrational and erratic trading, saw a substantial volume selloff in the last 15 minutes of trading after there was absolutely no volume done all day. What sparked it? Only a few momentum chasing quants know, even as the bid seemed dangerously close to getting unglued. Suddenly all the big-cap liquidity provisioning seemed just a tad tenuous. Another way of looking at it: a cheap appetizer of things to come. Is the January 4 rush for the exits entre next?