According to the just released NYSE short interest update, the number of shares short on the NYSE group has just dropped to 2010 lows, after dropping by over 1 billion since the August highs. This has occurred pretty much in linear fashion: in the last 4 months, there has been just one two week period in which the shorts have increased. What is just delightfully ironic, is that even as broad market volume has collapsed, biweekly short covering has surged on a relative basis. In essence, the bulk of the market buying has been short covering, which traditionally is always 'offer-lifting' heavy, as shorts are willing to pay any price to cover underwater positions, especially if there is an accelerant involved, such as when a repo desk advises its "client" that State Street has decided to force squeeze financial stocks for the nth time since March 2009.
The chart below shows that after standing firm through the end of September, shorts have capitulated and the bulk of the weak hands has by now been washed out.
The second chart shows the near relentless covering in biweekly short positions: