"Perhaps more to the point for TBTF (Too Big To Fail bank), if a SIFI (Systemically Important Financial Institution) does fail I have little doubt that private investors will in fact bear the losses-even if this leads to an outcome that is messier and more costly to society than we would ideally like. Dodd-Frank is very clear in saying that the Federal Reserve and other regulators cannot use their emergency authorities to bail out an individual failing institution"