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PIMCO Mortgage-Backed Securities Active Exchange-Traded Fund (PMBS)

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Upturn Advisory Summary
10/24/2025: PMBS (1-star) has a low Upturn Star Rating. Not recommended to BUY.
Analysis of Past Performance
Type ETF | Historic Profit 5.89% | Avg. Invested days 69 | Today’s Advisory Consider higher Upturn Star rating |
Upturn Star Rating ![]() | Upturn Advisory Performance | ETF Returns Performance |
Key Highlights
Volume (30-day avg) - | Beta - | 52 Weeks Range 46.29 - 49.43 | Updated Date - |
52 Weeks Range 46.29 - 49.43 | Updated Date - |
Upturn AI SWOT
PIMCO Mortgage-Backed Securities Active Exchange-Traded Fund
ETF Overview
Overview
The PIMCO Mortgage-Backed Securities Active Exchange-Traded Fund (MBB) is an actively managed ETF that invests primarily in agency mortgage-backed securities (MBS). It aims to provide current income by investing in a diversified portfolio of MBS, primarily those issued by U.S. government agencies.
Reputation and Reliability
PIMCO is a well-established and reputable investment management firm with a strong track record in fixed-income investing.
Management Expertise
PIMCO has a team of experienced portfolio managers specializing in mortgage-backed securities.
Investment Objective
Goal
To maximize current income, consistent with prudent investment management.
Investment Approach and Strategy
Strategy: Actively managed, focusing on identifying undervalued MBS opportunities and adjusting the portfolio based on market conditions and interest rate outlook.
Composition Primarily invests in mortgage-backed securities issued by U.S. government agencies and instrumentalities.
Market Position
Market Share: MBB does not have a directly comparable market share due to its specific focus within the broader fixed income ETF universe.
Total Net Assets (AUM): 18950000000
Competitors
Key Competitors
- iShares MBS ETF (MBG)
- Vanguard Mortgage-Backed Securities ETF (VMBS)
- SPDR Portfolio Mortgage Backed Bond ETF (SPMB)
Competitive Landscape
The MBS ETF market is competitive with several large players. MBB benefits from PIMCO's active management expertise and deep understanding of the MBS market. However, it typically has a higher expense ratio than passively managed competitors like VMBS, which may be a disadvantage for some investors.
Financial Performance
Historical Performance: Historical performance varies based on interest rate environment. Performance data readily available from various financial sources like Morningstar and PIMCO's website.
Benchmark Comparison: MBB's performance is typically compared to the Bloomberg US Mortgage Backed Securities Index.
Expense Ratio: 0.36
Liquidity
Average Trading Volume
MBB typically exhibits high trading volume, indicating good liquidity.
Bid-Ask Spread
The bid-ask spread for MBB is generally tight, reflecting its high liquidity.
Market Dynamics
Market Environment Factors
Interest rate movements, mortgage refinancing activity, and government housing policies significantly impact MBB's performance.
Growth Trajectory
Growth depends on investor demand for fixed-income securities and PIMCO's ability to generate alpha through active management. Changes in the portfolio composition are regularly reported.
Moat and Competitive Advantages
Competitive Edge
MBB's competitive edge lies in PIMCO's active management style, leveraging their expertise in the MBS market to potentially outperform passive benchmarks. Their experienced team can identify relative value opportunities and adjust the portfolio based on their macroeconomic outlook. This active approach aims to deliver superior risk-adjusted returns compared to passively managed MBS ETFs. Furthermore, PIMCO's extensive research capabilities and relationships within the MBS market provide an advantage.
Risk Analysis
Volatility
MBB's volatility is generally lower than equity ETFs but higher than U.S. Treasury ETFs. Volatility is tied to interest rate fluctuations.
Market Risk
Specific risks include interest rate risk (rising rates can decrease MBS values), prepayment risk (homeowners refinancing can reduce future income), and credit risk (though agency MBS have low credit risk).
Investor Profile
Ideal Investor Profile
Ideal for investors seeking current income and diversification within their fixed-income portfolio. Suitable for those comfortable with moderate interest rate risk.
Market Risk
Best suited for long-term investors seeking income and some capital appreciation potential. Not ideal for short-term traders due to its fixed-income nature.
Summary
MBB offers exposure to the MBS market through an actively managed approach. It is managed by PIMCO, a leading fixed-income manager. The fund aims to provide current income and potential capital appreciation. It suits investors seeking diversification in fixed income and are comfortable with moderate interest rate risk. However, the active management comes at a higher expense ratio than passively managed alternatives.
Peer Comparison
Sources and Disclaimers
Data Sources:
- PIMCO Website
- Morningstar
- Bloomberg
- ETF.com
Disclaimers:
This analysis is for informational purposes only and does not constitute investment advice. Past performance is not indicative of future results. Investments in ETFs carry risk, including the potential loss of principal.
AI Summarization is directionally correct and might not be accurate.
Summarized information shown could be a few years old and not current.
Fundamental Rating based on AI could be based on old data.
AI-generated summaries may have inaccuracies (hallucinations). Please verify the information before taking action.
About PIMCO Mortgage-Backed Securities Active Exchange-Traded Fund
Exchange NASDAQ | Headquaters - | ||
IPO Launch date - | CEO - | ||
Sector - | Industry - | Full time employees - | Website |
Full time employees - | Website | ||
The fund seeks to achieve its investment objective by investing under normal circumstances at least 80% of its assets in a diversified portfolio of mortgage-related fixed income instruments of varying maturities, which may be represented by forwards or derivatives such as options, futures contracts or swap agreements.

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