‹ PRU A6.2.20 PRU A6.2.22 › PRU A6.2.21 For the purposes of this Section Modified Duration is calculated as follows: Modified Duration = duration(D) / (1 + r) where: r = yield to maturity Ct = cash payment in time t m = total maturity ‹ PRU A6.2.20 PRU A6.2.22 ›