WEBVTT 00:00:05.810 --> 00:00:09.140 Duration tells investors the length of time in years 00:00:09.140 --> 00:00:12.129 that it will take the bonds cash flows to repay the investor 00:00:12.129 --> 00:00:14.210 the price he or she paid for the bond. 00:00:14.210 --> 00:00:17.110 A bond duration tells us how much a bonds 00:00:17.110 --> 00:00:18.940 price might change when interest rates 00:00:18.940 --> 00:00:21.550 change a higher duration number means a 00:00:21.550 --> 00:00:23.259 bonds price is more sensitive to 00:00:23.259 --> 00:00:25.359 interest rate changes while a lower 00:00:25.359 --> 00:00:27.519 duration number means a bonds price is 00:00:27.519 --> 00:00:29.279 less sensitive to interest rate changes 00:00:29.279 --> 00:00:32.049 this means that the price of a bond with 00:00:32.049 --> 00:00:34.150 a duration of five will increase or 00:00:34.150 --> 00:00:36.550 decrease by five percent when interest 00:00:36.550 --> 00:00:38.950 rates move by one percent a Long's 00:00:38.950 --> 00:00:40.990 duration depends on its interest rate 00:00:40.990 --> 00:00:43.960 call features yield credit quality and 00:00:43.960 --> 00:00:46.570 maturity the shorter the bond term the 00:00:46.570 --> 00:00:49.300 lower the duration and vice versa also 00:00:49.300 --> 00:00:51.040 the lower the coupon the higher the 00:00:51.040 --> 00:00:54.010 duration and vice-versa Christine has a 00:00:54.010 --> 00:00:57.070 bond with a 10-year maturity a 0.15 00:00:57.070 --> 00:01:00.280 percent yield to maturity a 2.25 percent 00:01:00.280 --> 00:01:03.550 annual rate a $1000 par value and 00:01:03.550 --> 00:01:05.950 quarterly coupon payments its duration 00:01:05.950 --> 00:01:09.040 is nine point one Michael has a similar bond 00:01:09.040 --> 00:01:11.620 with a 30-year maturity a zero 00:01:11.620 --> 00:01:13.390 point three five percent yield to 00:01:13.390 --> 00:01:16.600 maturity a 4.25 percent annual rate a 00:01:16.600 --> 00:01:19.750 $1000 par value and quarterly coupon 00:01:19.750 --> 00:01:22.270 payments its duration is fifteen point 00:01:22.270 --> 00:01:25.120 three two suppose the Federal Reserve 00:01:25.120 --> 00:01:27.190 announces changes in its interest rate 00:01:27.190 --> 00:01:29.290 policy and interest rates increase 00:01:29.290 --> 00:01:31.870 Christine's bond will decrease in value 00:01:31.870 --> 00:01:34.000 but Michaels bond will experience a 00:01:34.000 --> 00:01:35.920 bigger decrease because of its higher 00:01:35.920 --> 00:01:38.380 duration similarly if interest rates were to decrease Michaels bond would 00:01:40.420 --> 00:01:42.790 gain more value than christine's again 00:01:42.790 --> 00:01:45.159 because of its higher duration duration 00:01:45.159 --> 00:01:47.080 is just one factor that affects a Bloods value inflation risk default risk and 00:01:52.150 --> 00:01:54.310 call risk are also important but duration tells investors like Christine 00:01:54.310 --> 00:01:56.620 and Michael how much risk they face from interest rate changes.