I'm trying to calculate the forward contract on a zero coupon bond where the forward contract matures at t=4.
The zero coupon bond matures at t=10 and has a face value of 100. The price of that bond is 61.62
$n=10-period$ binomial model for the short-rate The lattice parameters are: $r(0,0) = 5\%, u = 1.1, d = 0.9d, q = 0.5, 1−q = 0.5$