We've heard that there is a lot of money on the sidelines waiting for things to turn around. Volume on the exchanges has been very low for quite a while. However once the tax question was answered in the first round of the fiscal cliff drama over $10 billion in funds streamed into stock mutual funds. That's the most in a week since 2001 according to an article I saw this morning. I would guess a bit of that streamed from bond funds as interest rates are seen going higher but also a bit is new money from money markets etc.
Will need to keep an eye on this as a continued trend this way bodes well for equities and makes shorting even more risky.