Summary: This is the calculation used for figuring the yield to
maturity of bonds and coupons purchased after 7/1/82 and before 1985. This
calculation can only be used if the period from purchase to maturity can be
divided exactly into full accrual periods. To calculate: (s.r.p. divided by
a.p.) raised to the (1 divided by m) power minus 1: where: s.r.p. is the stated
redemption price at maturity; a.p. is the acquisition price; m is number of full
accrual periods from purchase to maturity.