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Barclays MBS Bond Fund (MBB)
The iShares Barclays MBS Bond Fund seeks investment results that correspond generally to the price and yield performance, before fees and expenses, of the investment grade agency mortgage-backed securities sector of the United States as defined by the Barclays Capital U.S. MBS Index.

To view all holdings and learn more about mortgage exposure and cash investments in this fund, click here.
Fund Inception Date: 3/13/2007
Profile as of 7/2/2009
Total Net Assets (000) $1,514,069 S&P
Shares Outstanding 14,400,000 Fund Rating AAA
Management Fees 0.25%
Acquired Fund Fees & Expenses‡ 0.09%
Total Annual Fund Operating Expenses † 0.34%
Fundamentals Fund as of 7/1/2009 Index as of 6/30/2009
Number of Holdings 21 1647
Weighted Average Life 3.53 yr 5.76 yr
Weighted Average Coupon 2.77% 5.38%
Effective Duration 2.73 2.79
Yield Fund as of 6/30/2009 Index as of 6/30/2009
Distribution Yield 2.92% N/A
30-Day SEC Yield -0.03% N/A
Average Yield to Maturity 4.05% 4.34%
Top Holdings* (Daily) as of 7/1/2009
To view all holdings and learn more about mortgage exposure and cash investments in this fund, click here.
% of Fund Name Coupon Maturity Ratings (Moody's/S&P)
13.97% FNMA 30YR TBA(REG A) 5.50 7/13/2009 Aaa /AAA
10.55% FGOLD 30YR TBA(REG A) 5.50 7/13/2009 Aaa /AAA
7.71% FNMA 30YR TBA(REG A) 6.00 7/13/2009 Aaa /AAA
7.59% FGOLD 30YR TBA(REG A) 4.50 7/13/2009 Aaa /AAA
7.52% FGOLD 30YR TBA(REG A) 5.00 7/13/2009 Aaa /AAA
7.46% FGOLD 30YR TBA(REG A) 6.00 7/13/2009 Aaa /AAA
6.40% FNMA 30YR TBA(REG A) 5.00 7/13/2009 Aaa /AAA
5.10% FGOLD 15YR TBA(REG B) 4.50 7/16/2009 Aaa /AAA
5.07% FNMA 30YR TBA(REG A) 6.50 7/13/2009 Aaa /AAA
4.28% FGCI 5 7/08 5% Dec 15 2022 5.00 12/15/2022 Aaa /AAA
*Holdings are subject to change.
Top Sectors as of 7/1/2009 Trading Information
45.22% FHLMC
41.90% FNMA
9.46% GNMA
Related IndexN/A
NAV Per ShareMBB.NV
Und. Trading ValueMBB.IV
Shares OutstandingMBB.SO
Est. CashMBB.EU
Total CashMBB.TC
CUSIP464288588
Quality Ratings
as of 7/1/2009
% of Fund (Moody's) % of Fund (S&P)
U.S. Gov't/Agency 0.00 0.00
Aaa/AAA 98.50 98.50
Aa1/AA+ 0.00 0.00
Aa2/AA 0.00 0.00
Aa3/AA- 0.00 0.00
A1/A+ 0.00 0.00
A2/A 0.00 0.00
A3/A- 0.00 0.00
Baa1/BBB+ 0.00 0.00
Baa2/BBB 0.00 0.00
Baa3/BBB- 0.00 0.00
Ba1/BB+ 0.00 0.00
Ba2/BB 0.00 0.00
Ba3/BB- 0.00 0.00
B1/B+ 0.00 0.00
B2/B 0.00 0.00
B3/B- 0.00 0.00
Caa1/CCC+ 0.00 0.00
Caa2/CCC 0.00 0.00
Caa3/CCC- 0.00 0.00
Ca/CC 0.00 0.00
C/C 0.00 0.00
CI - 0.00
R - 0.00
SD - 0.00
D - 0.00
Other/NR 1.50 1.50
Average Govt Govt


Carefully consider the Funds' investment objectives, risk factors and charges and expenses before investing. This and other information can be found in the Funds' prospectuses, which may be obtained by calling 1-800-iShares (1-800-474-2737) or click here to view or download a prospectus. Read the prospectus carefully before investing.

Investing involves risk, including possible loss of principal.

‡ “Acquired Fund Fees and Expenses” reflect the Fund's pro rata share of the indirect fees and expenses incurred by investing in one or more acquired funds, such as mutual funds, business development companies, or other pooled investment vehicles. Acquired Fund Fees and Expenses are reflected in the prices of the acquired funds and thus included in the total returns of the Fund.

† The total annual operating expenses of the iShares Barclays Aggregate Bond Fund and iShares Barclays MBS Bond Fund include “acquired fund fees and expenses” which are related to the funds' investments in the BGI Prime Money Market Fund (the “money market fund”). “Acquired fund fees and expenses” represent the funds' pro rata share of the fees and expenses charged by the money market fund and may vary based on the funds' allocation of assets to the annualized net expenses of the money market fund. Annual operating expenses do not include the effect of interest earned by investments in the money market fund, which is expected to offset the money market fund's fees and expenses.

The iShares Funds ("Funds") are distributed by SEI Investments Distribution Co. (SEI). Barclays Global Fund Advisors (BGFA) serves as the investment advisor to the Funds. BGFA is a subsidiary of Barclays Global Investors, N.A., a majority-owned subsidiary of Barclays Bank PLC, none of which is affiliated with SEI.

Bonds and bond funds generally decrease in value as interest rates rise. Mortgage-backed securities are subject to prepayment and extension risk and therefore react differently to changes in interest rates than other bonds. Small movements in interest rates may quickly and significantly reduce the value of certain mortgage-backed securities.

The iShares Funds are not sponsored or endorsed by Barclays Capital, nor does this company make any representation regarding the advisability of investing in the Funds. Barclays Capital is an affiliate of Barclays Global Investors. Neither SEI nor its affiliates are affiliated with Barclays Capital. Index data source: Barclays Capital

Shares of iShares Funds are bought and sold at market price (not NAV) and are not individually redeemed from the Fund. Brokerage commissions will reduce returns.

Certain sectors and markets perform exceptionally well based on current market conditions and iShares funds can benefit from that performance. Achieving such exceptional returns involves the risk of volatility and investors should not expect that such results will be repeated.

©2009 Barclays Global Investors. All rights reserved. iShares® is a registered trademark of Barclays Global Investors, N.A.. All other trademarks, servicemarks or registered trademarks are the property of their respective owners.