Closing Market Price and NAV History

Date	Market Price1	Net Asset Value2	Bid/Ask Midpoint	Volume1	Net Assets2
8/30/2019	$56.78	$56.77	$56.75	232,327	$2,713,606,873
8/29/2019	$56.78	$56.74	$56.76	508,839	$2,706,583,244
8/28/2019	$56.15	$56.13	$56.14	254,652	$2,668,989,855
8/27/2019	$55.76	$55.76	$55.76	244,205	$2,640,259,550
8/26/2019	$55.73	$55.71	$55.73	241,706	$2,637,720,140
8/23/2019	$55.17	$55.11	$55.14	327,433	$2,609,656,753
8/22/2019	$56.61	$56.58	$56.59	953,970	$2,633,677,619
8/21/2019	$56.66	$56.62	$56.63	154,832	$2,627,274,433
8/20/2019	$56.19	$56.14	$56.16	162,303	$2,599,411,859
8/19/2019	$56.63	$56.60	$56.60	146,723	$2,620,588,867
8/16/2019	$55.96	$55.93	$55.93	174,573	$2,589,625,585
8/15/2019	$55.21	$55.18	$55.19	247,137	$2,552,020,970
8/14/2019	$54.99	$54.97	$54.97	285,580	$2,542,198,227
8/13/2019	$56.64	$56.61	$56.62	334,851	$2,606,805,598
8/12/2019	$55.85	$55.82	$55.83	209,365	$2,562,323,999
8/9/2019	$56.55	$56.51	$56.52	149,736	$2,593,757,245
8/8/2019	$56.79	$56.75	$56.77	453,424	$2,604,774,730
8/7/2019	$55.73	$55.67	$55.68	321,686	$2,546,821,327
8/6/2019	$55.66	$55.64	$55.64	314,224	$2,537,077,053
8/5/2019	$54.67	$54.63	$54.64	810,010	$2,491,322,270
8/2/2019	$56.40	$56.37	$56.38	293,492	$2,587,399,134
8/1/2019	$56.65	$56.61	$56.62	238,939	$2,598,502,758