A 'Palladium - Platinum price inversion' is it conceivable? Well, there has been a precedent:
Near the end of the 20th century, the days of cheap Palladium were numbered. Norilsk used to have ample Palladium supply after starting up its large Russian nickel mine. As the supply overhang disappeared in the late 1990's, the Pd price surged. Remember that gold quoted near its bear market bottom at that time. It didn't take much time for Palladium to leave behind gold. During 1999 Palladium was challenging the Platinum price, occasionally surpassing it on its rocky ride to the top.
Near the end of the 20th century, the days of cheap Palladium were numbered. Norilsk used to have ample Palladium supply after starting up its large Russian nickel mine. As the supply overhang disappeared in the late 1990's, the Pd price surged. Remember that gold quoted near its bear market bottom at that time. It didn't take much time for Palladium to leave behind gold. During 1999 Palladium was challenging the Platinum price, occasionally surpassing it on its rocky ride to the top.