I examined the Dollar Volume Flows into and out of each of the Dow stocks and indeed found that the Dow attracted net dollars on the trading session. Far and away the net money flow winner was XOM, followed by T, GE, and IBM. Stocks with net outflows on the day were paced by a stock that has seen outflows for a while: MSFT. Other stocks with outflows on the day were PFE, WMT, KO, JNJ, INTC, DIS, HON, GM, DD, CAT, C, and AIG. Of these, the first six have also had net outflows over the past several weeks.
What it looks like from this angle was that traders were putting their money into some old-line safe names--most notably an oil stock--and taking further money out of stocks that were already out of favor. Overall, however, there may have been less of an institutional exodus from large cap stocks than is apparent from the Dow chart.