SPDR Bloomberg Barclays Mortgage Backed Bond ETF
MBG
New York Stock Exchange Arca- -
USD
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- -
Capital Structure
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in mil. unless spec.Working Capital
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in mil. unless spec.Growth Rates
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in mil. unless spec.Quarterly Revenue
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in mil. unless spec.Quarterly Earnings Per Share
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in mil. unless spec.- Sector
- Financial Services
- Industry
- Asset Management
- Address
- Germany
- IPO Date
- Jan 30, 2009
- Similar Companies
- Business
- SPDR Bloomberg Barclays Mortgage Backed Bond ETF (MBG), now trading as SPDR Portfolio Mortgage Backed Bond ETF (SPMB), is an exchange-traded fund that seeks to provide investment results corresponding generally to the price and yield performance, before fees and expenses, of the Bloomberg U.S. MBS Index. The fund primarily invests in U.S. dollar-denominated fixed-rate investment-grade mortgage-backed securities issued or guaranteed by government-related agencies such as Fannie Mae, Freddie Mac and Ginnie Mae; these holdings focus on agency mortgage pass-through securities with a weighted average maturity of at least one year, emphasizing the U.S. investment-grade bond market's agency mortgage-backed segment. It employs a representative sampling technique to track the index, providing investors with diversified exposure to approximately 589 holdings, predominantly in securities with maturities in the intermediate to long-term range. Launched on January 15, 2009, and sponsored by State Street Global Advisors (SSGA), a division of State Street Corporation headquartered in Boston, Massachusetts, the ETF targets institutional and retail investors seeking fixed-income exposure to the U.S. mortgage-backed securities market. The fund operates within the broader fixed-income ETF segment, with assets under management previously noted around $300 million under the MBG ticker and now exceeding $6 billion as SPMB. In September 2019, the ETF underwent a significant rebranding from SPDR Bloomberg Barclays Mortgage Backed Bond ETF (MBG) to SPDR Portfolio Mortgage Backed Bond ETF (SPMB), aligning with SSGA's Portfolio suite of low-cost core ETFs designed for broad asset class exposure. This name and ticker change reflected a strategic shift to emphasize its role as a cost-efficient building block, with an expense ratio reduced to 0.04%, while maintaining the same investment objective and index tracking. No major acquisitions, partnerships or liquidations have been reported in the last 1-2 years, though the fund continues monthly dividend distributions yielding around 3.78% as of late 2025. The ETF trades exclusively on NYSE Arca in the United States, serving North American and global investors through U.S. fixed-income markets.