I saw Simon Hobbs on CNBC say this is a speculative attack on the European Central Bank (which I believe doesn't have enough capital if all the debt they hold goes down in value).
Sounds like this is Lehman lite, European style.
I read some comment that the 2008 plunge in U. S. was actually triggered by a cabal of banks (someone speculated Goldman, JP Morgan, Deutsche Bank, and I think UBS triggered huge margin calls in September 2008) and wonder if a similar cabal is at work again (?)
I have seen several comments that U. S. banks don't have that much financial exposure to Europe (supposed around noon there were rumors that U. S. regulators were forcing U. S. banks to decrease counter party risk to European banks).
When the dust settles, I think U. S. and U. S. economy will be in better position going forward, though it might take some time for that to manifest itself. Santelli seems to think U. S. economy will turn up in 6 - 7 months from now (this comment was made AFTER the markets closed today).
And unlike in 2008, I agree with Santelli that a global flush of financial system (controlled flush of U. S. financials in 2008, free fall European financials flush now) now might be long-term healthy.