Unfunded pension liabilities you won remimby reis trading and they're like the same thing. You bring up great points, but you just mash them all together in this Mashed potato of random things. It indicates that there is a higher degree of uncertainty on whether or not I'm actually going to get the value back for the bonds That i'm buying in us dollar denominator form. Or that the us dollar is actually going to be strong enough to cover the cost or it has enough kind of volatility.