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iShares MBS ETF (MBB)

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Upturn Advisory Summary
01/09/2026: MBB (2-star) has a low Upturn Star Rating. Not recommended to BUY.
Analysis of Past Performance
Type ETF | Historic Profit 11.28% | Avg. Invested days 63 | Today’s Advisory Consider higher Upturn Star rating |
Upturn Star Rating ![]() | Upturn Advisory Performance | ETF Returns Performance |
Key Highlights
Volume (30-day avg) - | Beta 1.12 | 52 Weeks Range 87.68 - 94.39 | Updated Date 06/29/2025 |
52 Weeks Range 87.68 - 94.39 | Updated Date 06/29/2025 |
Upturn AI SWOT
iShares MBS ETF
ETF Overview
Overview
The iShares MBS ETF (MBB) is designed to track the performance of the Markit iBoxx USD Liquid Investment Grade MBS Index. It offers investors exposure to investment-grade mortgage-backed securities issued by U.S. government agencies. The ETF's strategy focuses on providing income and diversification through a portfolio of these securities.
Reputation and Reliability
iShares, a subsidiary of BlackRock, is one of the largest and most reputable ETF providers globally. BlackRock has a long-standing track record and is known for its robust risk management and operational capabilities.
Management Expertise
BlackRock employs a team of experienced portfolio managers and research analysts with deep expertise in fixed income markets, including mortgage-backed securities.
Investment Objective
Goal
To provide investors with exposure to investment-grade U.S. mortgage-backed securities and generate income.
Investment Approach and Strategy
Strategy: The ETF aims to replicate the performance of the Markit iBoxx USD Liquid Investment Grade MBS Index. This involves holding securities that are constituents of the index.
Composition The ETF primarily holds U.S. agency mortgage-backed securities (MBS), which are backed by the full faith and credit of the U.S. government. These are typically pass-through securities issued by entities like Fannie Mae, Freddie Mac, and Ginnie Mae.
Market Position
Market Share: The ETF iShares MBS ETF has a significant market share within the U.S. Mortgage-Backed Securities ETF sector. (Specific numerical market share data is dynamic and not provided here, but it is a prominent player).
Total Net Assets (AUM): 14500000000
Competitors
Key Competitors
- Vanguard Mortgage-Backed Securities ETF (VMBS)
- SPDR Bloomberg Barclays MBS ETF (MBAR)
Competitive Landscape
The U.S. Mortgage-Backed Securities ETF market is competitive, with several large providers offering similar products. iShares MBS ETF benefits from BlackRock's extensive distribution network and brand recognition. However, competitors like Vanguard offer compelling low-cost options, and SPDR provides access to different index methodologies. The primary competitive factors include expense ratios, tracking error, and liquidity.
Financial Performance
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Benchmark Comparison: The iShares MBS ETF generally tracks its benchmark index, the Markit iBoxx USD Liquid Investment Grade MBS Index, closely. Performance is typically within a small margin of the index's returns, reflecting the ETF's passive management strategy.
Expense Ratio: 0.15
Liquidity
Average Trading Volume
The ETF exhibits good liquidity, with substantial average daily trading volume facilitating efficient entry and exit for investors.
Bid-Ask Spread
The bid-ask spread for the iShares MBS ETF is typically tight, indicating a low cost for trading and good market depth.
Market Dynamics
Market Environment Factors
The performance of the iShares MBS ETF is significantly influenced by interest rate movements, Federal Reserve monetary policy, and the overall health of the U.S. housing market. Changes in interest rates directly impact bond prices, and economic growth or contraction can affect mortgage prepayment speeds and credit quality.
Growth Trajectory
The ETF's growth trajectory is tied to investor demand for fixed-income exposure and the attractiveness of mortgage-backed securities as an asset class. Its holdings and strategy are generally stable, focused on replicating its benchmark index.
Moat and Competitive Advantages
Competitive Edge
The iShares MBS ETF's competitive edge stems from its issuer's strong reputation and the broad diversification it offers within the investment-grade MBS market. Its passive tracking strategy provides predictable performance relative to its benchmark. Furthermore, its association with BlackRock's extensive research and distribution capabilities enhances its appeal and accessibility to a wide range of investors seeking stable income and capital preservation.
Risk Analysis
Volatility
The ETF exhibits moderate volatility, typical of fixed-income investments. Its price movements are primarily driven by changes in interest rates and market sentiment towards MBS.
Market Risk
The primary market risks for this ETF include interest rate risk (bond prices fall when rates rise), prepayment risk (borrowers refinancing mortgages, affecting expected cash flows), and credit risk (though significantly mitigated by government backing).
Investor Profile
Ideal Investor Profile
The ideal investor for the iShares MBS ETF is one seeking to diversify their fixed-income portfolio with investment-grade mortgage-backed securities, aiming for a steady stream of income and capital preservation.
Market Risk
This ETF is best suited for long-term investors who are looking for a relatively conservative allocation within their fixed-income strategy and are comfortable with the specific risks associated with mortgage-backed securities.
Summary
The iShares MBS ETF (MBB) provides a diversified approach to investment-grade U.S. mortgage-backed securities, aiming to generate income and track its benchmark index. Backed by the reputation of iShares and BlackRock, it offers moderate volatility and is suitable for long-term investors seeking fixed-income exposure. Its primary risks include interest rate and prepayment sensitivities. The ETF competes in a well-established market with strong players offering similar products.
Similar ETFs
Sources and Disclaimers
Data Sources:
- iShares Official Website (BlackRock)
- Financial Data Providers (e.g., Morningstar, ETF.com)
Disclaimers:
This information is for educational purposes only and does not constitute investment advice. Past performance is not indicative of future results. Investors should consult with a qualified financial advisor before making investment decisions.
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 iShares MBS ETF
Exchange NASDAQ | Headquaters - | ||
IPO Launch date - | CEO - | ||
Sector - | Industry - | Full time employees - | Website |
Full time employees - | Website | ||
The fund will invest at least 80% of its assets in the component securities of the underlying index and TBAs that have economic characteristics that are substantially identical to the economic characteristics of the component securities of the index, and the fund will invest at least 90% of its assets in fixed income securities of the types included in the underlying index that BFA believes will help the fund track the index.

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