Many lessons should be learned from the 2008 Financial Crisis...

		One lesson is that credit rating agencies need to refine their models for evaluating esoteric credit risk created in MBS and CDOs.
		One lesson is that bankers seem not to scrutinize credit risk as closely when they serve only as mortgage originators and then pass it on to MBS investors rather than hold the paper themselves.
		One lesson is that borrowers must be more wary of putting complete faith in credit ratings.
		all of the options