Today, Tyler Durden posted the following charts on Zero Hedge which show the trading volumes for the IWM and SPY ETFs of May 26, 2009.
As Tyler points out, the trades are overwhelmingly dominated by JP Morgan for SPY and Deutsche Bank for IWM.
It is interesting to see how this relates to index development during morning trading. As published by the NYSE, this looks the following way. For convenience I took screenshots of the data this morning. The original data for SPY is here, and for IWM here.