what is the relation between these? 1) St = So . exp (r-sigmaˆ2/2)t + sigma . Zt 2) dSt = St . [mu.dt + sigma.dZt]
you meant (2) becomes (1)? so i have : dlnSt = mu.dt + sigma.dZt ---(3) then I let f = (3) using ito lemma df = df/dt.dt +df/dS.dS + 1/2 d2f/dS2.dt how do i substitute in? thanks examstudent.
cant undertsand your notation, but my notation is crap, but f= ln S and df/ds =1/s and 2nd deriv = -1/S^2