yes, norway is an insanely rich oil nation. the fund is called “oljefondet”. it comes from oil sales.

as for SDI, since it’s normalised and based on development, the nordic countries falling is only natural, since emerging economies are doing the stuff we did in the 70s. it doesn’t mean we’re getting worse, it means they’re rapidly getting better. ideally, SDI regresses to the mean.

also none of those articles mention that third point?