US Nominal GDP Chia Asset Token

The token is described here.  The value of the NDGP token (symbol NGDPLT in the Chia ecosystem) is meant to track US GDP minus 5% per year, starting from Q4 2007.  The value of the inverse token (symbol INGDP) should be $2 minus the value of the NGDP token.  But they're priced in XCH (Chia), since everything in the Chia ecosystem trades in XCH—and since XCHUSD fluctuates, the actual available prices on TibetSwap go up and down between fixings.  I set the official price when the advance GDP report comes out, with offers on Dexie.space, which last for at least a week.