How to know short volume on any stock. Finra has
Post# of 45510
This is ICPA yesterday
Date 20120628 |Symbol|ShortVolume|ShortExemptVolume|TotalVolume
... |ICPA| 3,154,362| 0| 33,536,582
There where over 3 million shares shorted yesterday with double prints reads as about 14 million of volume. Every stock is shorted to some degree by market makers to fill orders and by traders.
To find this every day go to http://regsho.finra.org/regsho-Index.html Scroll down to ORF once there, pick the date you want to know about and search for the symbol. This is updated every day. It's a great simple tool to help in understanding stock movements.