When talking about inflation adjustment what you really are trying to do is compare your investment to the alternative of no investment . But instead of having the null investment in cash which just sits , it goes into an imaginary stable commodity that tracks the inflation rate . So I guess what you would probably want to do is to convert all of those past investments into 2016 dollars using historical inflation rates and then compare that total to the results of your SP investment in 2016 dollars . The difference would be your inflation adjusted gains . <| sep |> Checking profiles , yasp , steam profiles for stream links and whatnot . Also , someone might have his pet bear break the cage . Again . The usual .