The action is good so far, but we need to see another few days of this -- with slight pullbacks and people then buying on those pullbacks -- for this to really indicate that some sort of bottom has been set,
At the end of the quarter you generally see some switching, so now we're seeing some institutions buying blue chips again.
The market is once again staying within the broader trading range, ... and in this case rotating out of commodity and related issues and buying tech and others that are perceived as being better values right now.
I think you're seeing buying today because of anticipation ahead of some of the economic and corporate news due in the next two days, particularly Dell tomorrow.