U.S. Total Bond Index Master Portfolio

Fund Profile

Fund profile

Fund manager

Master Investment Portfolio

Total assets

$3.41 bn

Liabilities

$381.74 mm

Net assets

$3.03 bn

Number of holdings

7.80 k

Top 200 of 7800 Holdings

As of Dec 2024

Security	$Holding	Balance	% of Fund	Category	Position	Country
BlackRock Cash Funds: Treasury, SL Agency Shares	162.27 mm	162.18 mm shares	5.35	Short-term investment vehicle	Long	USA
BlackRock Cash Funds: Institutional, SL Agency Shares	127.70 mm	127.64 mm shares	4.21	Short-term investment vehicle	Long	USA
U.S. Treasury Notes	19.14 mm	23.43 mm principal	0.63	Debt	Long	USA
U.S. Treasury Notes	18.89 mm	19.00 mm principal	0.62	Debt	Long	USA
U.S. Treasury Notes	15.95 mm	16.20 mm principal	0.53	Debt	Long	USA
U.S. Treasury Notes	14.95 mm	15.00 mm principal	0.49	Debt	Long	USA
U.S. Treasury Notes	14.36 mm	15.00 mm principal	0.47	Debt	Long	USA
U.S. Treasury Notes	14.32 mm	17.55 mm principal	0.47	Debt	Long	USA
U.S. Treasury Notes	14.17 mm	14.99 mm principal	0.47	Debt	Long	USA
U.S. Treasury Notes	13.93 mm	14.00 mm principal	0.46	Debt	Long	USA
U.S. Treasury Notes	13.08 mm	13.00 mm principal	0.43	Debt	Long	USA
U.S. Treasury Notes	12.00 mm	12.00 mm principal	0.40	Debt	Long	USA
U.S. Treasury Notes	11.88 mm	12.00 mm principal	0.39	Debt	Long	USA
U.S. Treasury Notes	11.87 mm	12.22 mm principal	0.39	Debt	Long	USA
U.S. Treasury Notes	11.81 mm	12.00 mm principal	0.39	Debt	Long	USA
U.S. Treasury Notes	11.68 mm	13.00 mm principal	0.39	Debt	Long	USA
U.S. Treasury Notes	11.35 mm	11.40 mm principal	0.37	Debt	Long	USA
U.S. Treasury Notes	11.07 mm	11.00 mm principal	0.37	Debt	Long	USA
U.S. Treasury Notes	10.98 mm	11.00 mm principal	0.36	Debt	Long	USA
Fannie Mae Pool	10.87 mm	13.29 mm principal	0.36	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	10.47 mm	11.00 mm principal	0.35	Debt	Long	USA
U.S. Treasury Notes	10.23 mm	11.00 mm principal	0.34	Debt	Long	USA
Fannie Mae Pool	10.19 mm	13.02 mm principal	0.34	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	10.08 mm	10.00 mm principal	0.33	Debt	Long	USA
U.S. Treasury Notes	10.04 mm	10.00 mm principal	0.33	Debt	Long	USA
U.S. Treasury Notes	9.95 mm	10.20 mm principal	0.33	Debt	Long	USA
U.S. Treasury Notes	9.93 mm	11.00 mm principal	0.33	Debt	Long	USA
U.S. Treasury Notes	9.89 mm	10.00 mm principal	0.33	Debt	Long	USA
U.S. Treasury Notes	9.75 mm	10.18 mm principal	0.32	Debt	Long	USA
U.S. Treasury Notes	9.47 mm	10.00 mm principal	0.31	Debt	Long	USA
U.S. Treasury Notes	9.39 mm	11.57 mm principal	0.31	Debt	Long	USA
U.S. Treasury Bonds	9.23 mm	9.50 mm principal	0.30	Debt	Long	USA
U.S. Treasury Notes	9.19 mm	10.00 mm principal	0.30	Debt	Long	USA
U.S. Treasury Notes	9.02 mm	9.00 mm principal	0.30	Debt	Long	USA
U.S. Treasury Notes	8.96 mm	9.00 mm principal	0.30	Debt	Long	USA
U.S. Treasury Notes	8.96 mm	9.00 mm principal	0.30	Debt	Long	USA
U.S. Treasury Notes	8.87 mm	10.00 mm principal	0.29	Debt	Long	USA
Freddie Mac Pool	8.71 mm	11.12 mm principal	0.29	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	8.68 mm	10.52 mm principal	0.29	Debt	Long	USA
U.S. Treasury Bonds	8.67 mm	9.50 mm principal	0.29	Debt	Long	USA
U.S. Treasury Notes	8.53 mm	9.50 mm principal	0.28	Debt	Long	USA
U.S. Treasury Bonds	8.41 mm	8.50 mm principal	0.28	Debt	Long	USA
U.S. Treasury Notes	8.40 mm	8.50 mm principal	0.28	Debt	Long	USA
Ginnie Mae	8.38 mm	8.64 mm principal	0.28	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	8.36 mm	8.50 mm principal	0.28	Debt	Long	USA
U.S. Treasury Notes	8.30 mm	8.50 mm principal	0.27	Debt	Long	USA
U.S. Treasury Notes	8.29 mm	8.54 mm principal	0.27	Debt	Long	USA
Ginnie Mae II Pool	8.19 mm	9.79 mm principal	0.27	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	8.17 mm	8.48 mm principal	0.27	Debt	Long	USA
U.S. Treasury Notes	8.10 mm	8.48 mm principal	0.27	Debt	Long	USA
Uniform Mortgage-Backed Security, TBA	8.10 mm	8.86 mm principal	0.27	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	8.03 mm	8.00 mm principal	0.27	Debt	Long	USA
U.S. Treasury Notes	8.00 mm	8.00 mm principal	0.26	Debt	Long	USA
U.S. Treasury Notes	7.99 mm	9.50 mm principal	0.26	Debt	Long	USA
U.S. Treasury Notes	7.98 mm	8.00 mm principal	0.26	Debt	Long	USA
U.S. Treasury Notes	7.95 mm	8.00 mm principal	0.26	Debt	Long	USA
Uniform Mortgage-Backed Security, TBA	7.92 mm	9.32 mm principal	0.26	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	7.89 mm	8.50 mm principal	0.26	Debt	Long	USA
U.S. Treasury Notes	7.83 mm	8.00 mm principal	0.26	Debt	Long	USA
U.S. Treasury Notes	7.82 mm	8.00 mm principal	0.26	Debt	Long	USA
U.S. Treasury Notes	7.76 mm	9.20 mm principal	0.26	Debt	Long	USA
U.S. Treasury Notes	7.43 mm	7.88 mm principal	0.25	Debt	Long	USA
Uniform Mortgage-Backed Security, TBA	7.41 mm	8.38 mm principal	0.24	ABS-mortgage backed security	Long	USA
U.S. Treasury Bonds	7.26 mm	10.84 mm principal	0.24	Debt	Long	USA
Ginnie Mae	7.12 mm	7.18 mm principal	0.23	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	7.02 mm	7.00 mm principal	0.23	Debt	Long	USA
U.S. Treasury Notes	7.00 mm	7.00 mm principal	0.23	Debt	Long	USA
Uniform Mortgage-Backed Security, TBA	6.88 mm	8.85 mm principal	0.23	ABS-mortgage backed security	Long	USA
U.S. Treasury Bonds	6.73 mm	7.37 mm principal	0.22	Debt	Long	USA
U.S. Treasury Notes	6.69 mm	7.48 mm principal	0.22	Debt	Long	USA
U.S. Treasury Bonds	6.59 mm	7.40 mm principal	0.22	Debt	Long	USA
U.S. Treasury Notes	6.50 mm	6.79 mm principal	0.21	Debt	Long	USA
U.S. Treasury Notes	6.44 mm	6.50 mm principal	0.21	Debt	Long	USA
Uniform Mortgage-Backed Security, TBA	6.43 mm	7.90 mm principal	0.21	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	6.39 mm	6.45 mm principal	0.21	Debt	Long	USA
U.S. Treasury Notes	6.32 mm	7.09 mm principal	0.21	Debt	Long	USA
U.S. Treasury Notes	6.32 mm	6.62 mm principal	0.21	Debt	Long	USA
U.S. Treasury Notes	6.29 mm	6.94 mm principal	0.21	Debt	Long	USA
U.S. Treasury Notes	6.24 mm	6.88 mm principal	0.21	Debt	Long	USA
Fannie Mae Pool	6.23 mm	7.96 mm principal	0.21	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	6.18 mm	7.54 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	6.16 mm	6.79 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	6.11 mm	6.79 mm principal	0.20	Debt	Long	USA
U.S. Treasury Bonds	6.10 mm	7.50 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	6.08 mm	6.40 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	6.08 mm	6.79 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	6.05 mm	6.36 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	6.05 mm	6.40 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	6.04 mm	6.79 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	6.03 mm	6.00 mm principal	0.20	Debt	Long	USA
Uniform Mortgage-Backed Security, TBA	6.01 mm	6.09 mm principal	0.20	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	5.99 mm	6.00 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	5.98 mm	6.00 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	5.98 mm	6.00 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	5.95 mm	6.17 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	5.95 mm	6.00 mm principal	0.20	Debt	Long	USA
Uniform Mortgage-Backed Security, TBA	5.94 mm	6.32 mm principal	0.20	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	5.93 mm	6.00 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	5.92 mm	6.00 mm principal	0.20	Debt	Long	USA
U.S. Treasury Notes	5.90 mm	6.18 mm principal	0.19	Debt	Long	USA
U.S. Treasury Notes	5.88 mm	6.00 mm principal	0.19	Debt	Long	USA
U.S. Treasury Notes	5.84 mm	6.00 mm principal	0.19	Debt	Long	USA
U.S. Treasury Notes	5.84 mm	6.18 mm principal	0.19	Debt	Long	USA
U.S. Treasury Bonds	5.83 mm	8.20 mm principal	0.19	Debt	Long	USA
U.S. Treasury Notes	5.78 mm	6.00 mm principal	0.19	Debt	Long	USA
U.S. Treasury Notes	5.75 mm	6.00 mm principal	0.19	Debt	Long	USA
U.S. Treasury Notes	5.74 mm	6.40 mm principal	0.19	Debt	Long	USA
U.S. Treasury Notes	5.70 mm	6.30 mm principal	0.19	Debt	Long	USA
U.S. Treasury Notes	5.69 mm	6.96 mm principal	0.19	Debt	Long	USA
U.S. Treasury Notes	5.68 mm	5.65 mm principal	0.19	Debt	Long	USA
U.S. Treasury Notes	5.54 mm	6.00 mm principal	0.18	Debt	Long	USA
Ginnie Mae	5.52 mm	6.90 mm principal	0.18	ABS-mortgage backed security	Long	USA
U.S. Treasury Bonds	5.43 mm	6.00 mm principal	0.18	Debt	Long	USA
U.S. Treasury Notes	5.42 mm	5.98 mm principal	0.18	Debt	Long	USA
U.S. Treasury Notes	5.37 mm	5.75 mm principal	0.18	Debt	Long	USA
U.S. Treasury Notes	5.34 mm	5.98 mm principal	0.18	Debt	Long	USA
U.S. Treasury Notes	5.33 mm	5.94 mm principal	0.18	Debt	Long	USA
U.S. Treasury Notes	5.29 mm	5.48 mm principal	0.17	Debt	Long	USA
U.S. Treasury Notes	5.16 mm	5.42 mm principal	0.17	Debt	Long	USA
U.S. Treasury Bonds	5.14 mm	8.85 mm principal	0.17	Debt	Long	USA
Ginnie Mae II Pool	5.12 mm	6.40 mm principal	0.17	ABS-mortgage backed security	Long	USA
Freddie Mac Pool	5.10 mm	5.05 mm principal	0.17	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	5.09 mm	5.00 mm principal	0.17	Debt	Long	USA
U.S. Treasury Bonds	5.05 mm	5.80 mm principal	0.17	Debt	Long	USA
U.S. Treasury Notes	5.04 mm	5.00 mm principal	0.17	Debt	Long	USA
U.S. Treasury Notes	5.04 mm	5.00 mm principal	0.17	Debt	Long	USA
U.S. Treasury Notes	5.03 mm	5.33 mm principal	0.17	Debt	Long	USA
U.S. Treasury Notes	5.02 mm	5.00 mm principal	0.17	Debt	Long	USA
U.S. Treasury Notes	5.01 mm	5.00 mm principal	0.17	Debt	Long	USA
U.S. Treasury Notes	4.99 mm	5.00 mm principal	0.16	Debt	Long	USA
U.S. Treasury Notes	4.98 mm	5.00 mm principal	0.16	Debt	Long	USA
U.S. Treasury Notes	4.97 mm	5.00 mm principal	0.16	Debt	Long	USA
U.S. Treasury Notes	4.94 mm	5.00 mm principal	0.16	Debt	Long	USA
U.S. Treasury Notes	4.94 mm	5.09 mm principal	0.16	Debt	Long	USA
U.S. Treasury Notes	4.88 mm	5.00 mm principal	0.16	Debt	Long	USA
Freddie Mac Multifamily Structured Pass Through Certificates	4.87 mm	5.00 mm principal	0.16	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	4.87 mm	5.09 mm principal	0.16	Debt	Long	USA
U.S. Treasury Notes	4.86 mm	5.40 mm principal	0.16	Debt	Long	USA
U.S. Treasury Notes	4.85 mm	5.09 mm principal	0.16	Debt	Long	USA
U.S. Treasury Notes	4.84 mm	5.00 mm principal	0.16	Debt	Long	USA
U.S. Treasury Notes	4.81 mm	5.09 mm principal	0.16	Debt	Long	USA
Fannie Mae Pool	4.78 mm	5.82 mm principal	0.16	ABS-mortgage backed security	Long	USA
U.S. Treasury Bonds	4.77 mm	5.00 mm principal	0.16	Debt	Long	USA
Freddie Mac Pool	4.71 mm	4.86 mm principal	0.16	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	4.70 mm	5.09 mm principal	0.16	Debt	Long	USA
U.S. Treasury Notes	4.67 mm	5.09 mm principal	0.15	Debt	Long	USA
U.S. Treasury Notes	4.66 mm	4.93 mm principal	0.15	Debt	Long	USA
U.S. Treasury Bonds	4.65 mm	8.14 mm principal	0.15	Debt	Long	USA
U.S. Treasury Notes	4.60 mm	5.09 mm principal	0.15	Debt	Long	USA
U.S. Treasury Notes	4.59 mm	5.09 mm principal	0.15	Debt	Long	USA
U.S. Treasury Bonds	4.58 mm	5.20 mm principal	0.15	Debt	Long	USA
U.S. Treasury Bonds	4.58 mm	7.28 mm principal	0.15	Debt	Long	USA
U.S. Treasury Notes	4.55 mm	4.75 mm principal	0.15	Debt	Long	USA
U.S. Treasury Notes	4.55 mm	5.24 mm principal	0.15	Debt	Long	USA
Freddie Mac Pool	4.48 mm	5.71 mm principal	0.15	ABS-mortgage backed security	Long	USA
U.S. Treasury Bonds	4.47 mm	5.50 mm principal	0.15	Debt	Long	USA
U.S. Treasury Notes	4.47 mm	4.67 mm principal	0.15	Debt	Long	USA
Ginnie Mae II Pool	4.43 mm	5.53 mm principal	0.15	ABS-mortgage backed security	Long	USA
U.S. Treasury Bonds	4.41 mm	6.30 mm principal	0.15	Debt	Long	USA
U.S. Treasury Notes	4.39 mm	4.50 mm principal	0.14	Debt	Long	USA
Fannie Mae Pool	4.36 mm	5.57 mm principal	0.14	ABS-mortgage backed security	Long	USA
Ginnie Mae II Pool	4.33 mm	5.18 mm principal	0.14	ABS-mortgage backed security	Long	USA
Freddie Mac Pool	4.32 mm	5.03 mm principal	0.14	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	4.29 mm	4.50 mm principal	0.14	Debt	Long	USA
U.S. Treasury Bonds	4.22 mm	7.07 mm principal	0.14	Debt	Long	USA
Fannie Mae Pool	4.20 mm	5.08 mm principal	0.14	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	4.19 mm	4.55 mm principal	0.14	Debt	Long	USA
Fannie Mae Pool	4.14 mm	5.01 mm principal	0.14	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	4.11 mm	4.27 mm principal	0.14	Debt	Long	USA
U.S. Treasury Bonds	4.09 mm	5.70 mm principal	0.13	Debt	Long	USA
CarMax Auto Owner Trust 2023-4	4.07 mm	4.00 mm principal	0.13	ABS-other	Long	USA
U.S. Treasury Bonds	4.06 mm	5.72 mm principal	0.13	Debt	Long	USA
U.S. Treasury Notes	4.05 mm	4.24 mm principal	0.13	Debt	Long	USA
U.S. Treasury Notes	4.04 mm	4.00 mm principal	0.13	Debt	Long	USA
U.S. Treasury Notes	4.04 mm	4.00 mm principal	0.13	Debt	Long	USA
U.S. Treasury Notes	4.04 mm	4.00 mm principal	0.13	Debt	Long	USA
U.S. Treasury Bonds	3.99 mm	7.18 mm principal	0.13	Debt	Long	USA
Federal National Mortgage Association	3.95 mm	3.49 mm principal	0.13	Debt	Long	USA
Ginnie Mae	3.95 mm	3.93 mm principal	0.13	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	3.95 mm	4.00 mm principal	0.13	Debt	Long	USA
U.S. Treasury Bonds	3.95 mm	4.00 mm principal	0.13	Debt	Long	USA
U.S. Treasury Notes	3.93 mm	4.00 mm principal	0.13	Debt	Long	USA
U.S. Treasury Notes	3.92 mm	4.00 mm principal	0.13	Debt	Long	USA
U.S. Treasury Notes	3.91 mm	4.00 mm principal	0.13	Debt	Long	USA
U.S. Treasury Notes	3.91 mm	4.00 mm principal	0.13	Debt	Long	USA
Freddie Mac Pool	3.90 mm	4.97 mm principal	0.13	ABS-mortgage backed security	Long	USA
U.S. Treasury Notes	3.88 mm	4.24 mm principal	0.13	Debt	Long	USA
U.S. Treasury Bonds	3.88 mm	4.00 mm principal	0.13	Debt	Long	USA
Ginnie Mae	3.87 mm	4.20 mm principal	0.13	ABS-mortgage backed security	Long	USA
Uniform Mortgage-Backed Security, TBA	3.84 mm	4.22 mm principal	0.13	ABS-mortgage backed security	Long	USA
U.S. Treasury Bonds	3.77 mm	7.23 mm principal	0.12	Debt	Long	USA
U.S. Treasury Notes	3.77 mm	4.00 mm principal	0.12	Debt	Long	USA
Uniform Mortgage-Backed Security, TBA	3.72 mm	3.70 mm principal	0.12	ABS-mortgage backed security	Long	USA
Ginnie Mae	3.71 mm	3.92 mm principal	0.12	ABS-mortgage backed security	Long	USA
U.S. Treasury Bonds	3.69 mm	6.70 mm principal	0.12	Debt	Long	USA
U.S. Treasury Notes	3.69 mm	4.07 mm principal	0.12	Debt	Long	USA
Fannie Mae Pool	3.68 mm	4.50 mm principal	0.12	ABS-mortgage backed security	Long	USA
U.S. Treasury Bonds	3.67 mm	5.03 mm principal	0.12	Debt	Long	USA
U.S. Treasury Bonds	3.67 mm	4.26 mm principal	0.12	Debt	Long	USA
U.S. Treasury Bonds	3.64 mm	5.14 mm principal	0.12	Debt	Long	USA