I trade the 30 year and 10 year treasury futures contracts. There's 1 issue I dont understand working out the notional value. Lets take the ZB (30 year) as an example. Each increment is 1/32 ($31.25) so say beginning at 135'00 you have $135,000, 135'01 ($135,031.25), 135'02 ($135,062.50) etc...