Ben Bernanke actually said...

we want to keep the option open to buy Treasury securities if we think that is the best way to improve the functioning or reduce interest ra...

So the purpose of the test is to try to ensure that even in a bad scenario, banks will have enough capital.

We are going to be very tough on them to make sure... they take whatever drastic steps are necessary to restore themselves to profitability.

There is no commitment by any means to never shut down a big bank. Absolutely not.