Today's action looked like there was a lot of shorting going on, as usual. Turns out that about one third of the volume was short. SFMI held up well under what has become a daily attack of the shorts.

Here's a link to the FINRA regsho (short) data. Scroll down for SFMI. Change the url to get data for different dates. For example, today's list is at <http://regsho.finra.org/FORFshvol20100421.txt> since today's date is 2010-4-21, or 2010421. Tomorrow will be 2010422.

FINRA daily short data