Between quarter-end, quad-witching, and the index-rebalancing, activity at the NYSE soared today. More than triple the average of the last few weeks, today's volume was the highest since the US downgrade last August - over 13 months ago - and given the downward pressure in prices into the close it seems more motivated sellers than buyers locking in anticipated Fed/ECB gains.
NYSEVOL via Bloomberg...
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Charts: Bloomberg