The opinion has three parts:
1) The Court identifies the abstract idea contained in the patent as the general concept of intermediated settlement. (Slip. Op. at 9) The key takeaway here is the discussion about whether an "abstract idea" has to be on the level of a "law of nature" in order to be excluded. The Court says that an abstract idea need not reduce to some fundamental truth that has always existed. It is sufficient for it to be a "fundamental economic practice" or "longstanding commercial practice," like the concept of "risk hedging" in Bilski. (Slip. Op. at 10)
2) The Court looks to see if the patent adds anything more to the abstract idea, and concludes that all it does is describe how to implement the idea in a general computer, in the generic and conventional way. (Slip. Op. at 12, 15) The Court analogizes to Mayo, in which it decided that the claimed method amounted to no more than instructing doctors as to how to use a well-known process for measuring metabolite levels to diagnose their patients. (Slip. Op. at 11) The Court states that the claimed method simply describes how to instruct a computer to perform the abstract idea of intermediating settlement. The Court makes a point of noting that the computer implementation described here is "wholly generic" and that "[i]n short, each step does no more than require a generic computer to perform generic computer functions." (Slip. Op. at 13, 15)
3) The Court concludes that the "system" claims are no different in substance from the method claims: "But what petitioner characterizes as specific hardware—a 'data processing system' with a 'communications controller' and 'data storage unit,' for example, see App. 954, 958, 1257—is purely functional and generic. Nearly every computer will include a 'communications controller' and 'data storage unit' capable of performing the basic calculation, storage, and transmission functions required by the method claims." (Slip. Op. at 16)