Can you patent a financial product or security?

For example are products like collateralized loan obligations (i.e. mortgage/asset-backed securities), or the process by which they are securitized, patentable?

Secondarily, given recent changes in both legislative and judicial opinions on 'business method patents' (i.e. America Invents Act), would such a patent be enforceable or could it be considered an 'abstract idea' not patentable under Section 101 of US Patent Laws?