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- Upturn Summary
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Upturn AI Summary
iShares MBS ETF(MBB)
Advisory History & Simulated Performance *
*as per simulation (see disclosures)- ALL
- 1Y
- 1M
- 1W
- BUY Advisory
- SELL Advisory (Profit)
- SELL Advisory (Loss)
- Profit
- Loss
- PASS (Skip)
Stock price based on last close Advisory Performance History (Simulated)
Upturn Advisory & Investor View for MBB
10/08/2026: MBB (3-star) is currently NOT-A-BUY. Pass it for now.
The iShares MBS ETF (MBB) provides investors with efficient, low-cost exposure to the US agency mortgage-backed securities market. By tracking an index of Ginnie Mae, Fannie Mae, and Freddie Mac securities, it offers a high-quality income stream with minimal credit risk compared to corporate bonds. Its primary use case is as a core, conservative fixed-income holding to stabilize broader portfolios. Investors should remain mindful of interest rate sensitivity and prepayment risk, which remain the primary drivers of performance. This fund is well-suited for long-term, income-focused investors looking for liquidity and professional management.
How to Read the Upturn Advisory
The Upturn Star Rating and the current BUY, SELL, or PASS advisory are generated by Upturn’s AI advisory engine based on proprietary signal analysis, price behavior, advisory history, and historical signal performance.
ETF holdings, costs, diversification, valuation, risks, and market conditions provide supporting context about the fund.
Investor Fit
| Investor style | Fit | Why |
|---|---|---|
| Growth investor | Weak fit | This fund focuses on income rather than capital appreciation. |
| Momentum investor | Weak fit | Fixed-income ETFs generally do not exhibit the trends momentum investors seek. |
| Value investor | Mixed fit | It provides steady value through yield but lacks the upside potential of equities. |
| Dividend/Income investor | Strong fit | It provides consistent monthly income distributions derived from mortgage payments. |
| Low-risk investor | Strong fit | Agency MBS carry the implicit guarantee of the US government, offering lower credit risk. |
Investor Profile
Ideal Investor Profile
Conservative investors or those seeking a stable source of monthly income with minimal credit risk.
Suitability
Best for long-term passive investors looking to round out their fixed-income allocation.
Risk Profile
| Risk factor | Level | Why it matters |
|---|---|---|
| Volatility | Medium | Prices fluctuate based on interest rate changes and duration risk. |
| Market risk | Medium | Changes in general market interest rates impact the value of mortgage bonds. |
| Concentration | Low | The fund is broadly diversified across many thousands of individual mortgage-backed securities. |
| Tracking/expense | Low | The very low expense ratio minimizes the drag on overall performance. |
| Liquidity | Low | The high volume makes it easy to trade without significant price impact. |
| Business/sector quality | Low | The underlying assets are agency-backed, significantly reducing credit default risk. |
Risk Analysis
Volatility
Moderate; primarily influenced by the duration of the underlying mortgage pools and interest rate environments.
Market Risk
Subject to interest rate risk and prepayment risk, where changes in economic activity shift the expected life of the bonds.
What the ETF Owns
| Exposure Type | Exposure | Weight (%) | Retail Investor Read |
|---|---|---|---|
| Fixed-income type | US Agency Mortgage-Backed Securities (MBS) | 99.5 | This exposure provides broad, diversified access to the US agency MBS market, acting as a core bond holding. |
| Cash/collateral | Cash and Cash Equivalents | 0.5 | A small portion of assets is held in cash to manage daily liquidity requirements and fund flows. |
Price Behavior
Flat / Range-Bound
The stock price has been trading within a narrow range with minimal directional movement.
Very Smooth
The stock has followed a highly orderly price path with minimal short-term disruption.
Analysis of Past Performance
Type ETF | Historic Profit 11.91% | Avg. Invested days 68 | Today’s Advisory PASS |
Upturn Advisory Rating  | Upturn Advisory Performance  4.0 | ETF Returns Performance  3.0 |
| Profits based on simulation | Last Close 10/08/2026 |
ETF Fundamentals 
Source: EOD Historical Data • Updated Oct 8, 2026
Fund Basics
| Metric | Value |
|---|---|
| Fund Size (AUM) | $35.44B |
| Issuer | iShares |
| Expense Ratio | 0.04% |
| Distribution Yield | 4.51% |
| Inception | Mar 13, 2007 |
Performance
| Period | Total Return |
|---|---|
| YTD | -3.21% |
| 1 Year | -2.18% |
| 3 Year | +4.83% |
| 5 Year | -0.46% |
| 10 Year | +0.81% |
Risk Metrics
| Metric | Value |
|---|---|
| 1Y Volatility | 4.68% |
| 3Y Volatility | 6.45% |
| 3Y Sharpe Ratio | 0.01 |
Top Sectors
| Sector | Weight |
|---|---|
| Basic Materials | 0.00% |
| Consumer Cyclicals | 0.00% |
| Financial Services | 0.00% |
| Real Estate | 0.00% |
Asset Allocation
Portfolio Characteristics
| Metric | Value |
|---|---|
| Holdings Turnover | 2.49% |
Top Holdings
| Holding | Weight |
|---|---|
| BlackRock Cash Funds Instl SL Agency | 6.49% |
Upturn AI Summary
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.
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