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Upturn AI Summary
SPDR Portfolio Mortgage Backed Bond(SPMB)
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 SPMB
09/25/2026: SPMB (3-star) is currently NOT-A-BUY. Pass it for now.
SPMB provides low-cost exposure to the US agency mortgage-backed securities market, holding bonds guaranteed by government agencies. Its primary strengths are its extremely low expense ratio, institutional management, and focus on high-credit-quality debt. It serves as an effective tool for investors aiming to add yield and stability to a diversified portfolio. Key risks include sensitivity to interest rate fluctuations and mortgage prepayment behavior. This ETF is well-suited for long-term income-focused investors who prioritize credit safety over aggressive growth.
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 is designed for capital preservation and income rather than aggressive capital appreciation. |
| Momentum investor | Weak fit | MBS assets typically exhibit low price momentum compared to equities, making this fund unsuitable for momentum strategies. |
| Value investor | Mixed fit | Value investors may appreciate the predictable yield, though the fund lacks the traditional valuation metrics used in stock picking. |
| Dividend/Income investor | Strong fit | SPMB offers consistent monthly income distributions, making it an excellent candidate for income-focused portfolios. |
| Low-risk investor | Strong fit | The high credit quality of government agency-backed securities makes this a conservative choice for income generation. |
Investor Profile
Ideal Investor Profile
Conservative investors or those seeking a core, government-backed fixed-income allocation to diversify away from equities.
Suitability
Best for long-term investors seeking consistent income and moderate risk management.
Risk Profile
| Risk factor | Level | Why it matters |
|---|---|---|
| Volatility | Medium | MBS prices are sensitive to interest rate fluctuations and prepayments. |
| Market risk | Medium | General bond market conditions directly influence the value of the holdings. |
| Concentration | Medium / high | The fund is heavily concentrated in the specific sector of mortgage-backed securities. |
| Tracking/expense | Low | The low expense ratio and passive strategy minimize tracking error risks. |
| Liquidity | Low | The underlying securities are generally liquid, though market stress can impact spreads. |
| Business/sector quality | Low / none | The securities are backed by government agencies, minimizing default risk. |
Risk Analysis
Volatility
SPMB generally exhibits lower volatility than equity ETFs but remains sensitive to interest rate shifts common in the bond market.
Market Risk
The primary risk is interest rate risk, where the value of the MBS decreases as market interest rates rise.
What the ETF Owns
| Exposure Type | Exposure | Weight (%) | Retail Investor Read |
|---|---|---|---|
| Fixed-income type | US Agency Mortgage-Backed Securities (MBS) | 99.5 | This provides broad exposure to the residential mortgage market backed by US government agencies, offering a balance of yield and credit quality. |
| Cash/collateral | Cash and Cash Equivalents | 0.5 | A small cash buffer is maintained to manage daily fund flows and operational liquidity. |
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 12.7% | Avg. Invested days 67 | Today’s Advisory PASS |
Upturn Advisory Rating  | Upturn Advisory Performance  4.0 | ETF Returns Performance  3.0 |
| Profits based on simulation | Last Close 09/25/2026 |
ETF Fundamentals 
Source: EOD Historical Data • Updated Sep 27, 2026
Fund Basics
| Metric | Value |
|---|---|
| Fund Size (AUM) | $6.88B |
| Issuer | State Street Investment Management |
| Expense Ratio | 0.04% |
| Distribution Yield | 4.16% |
| Inception | Jan 15, 2009 |
Performance
| Period | Total Return |
|---|---|
| YTD | -2.44% |
| 1 Year | -0.85% |
| 3 Year | +4.59% |
| 5 Year | -0.29% |
| 10 Year | +0.83% |
Risk Metrics
| Metric | Value |
|---|---|
| 1Y Volatility | 3.33% |
| 3Y Volatility | 6.45% |
| 3Y Sharpe Ratio | 0.01 |
Ratings
| Metric | Value |
|---|---|
| Morningstar Rating | ★★★★★ |
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 | 14.0% |
Top Holdings
| Holding | Weight |
|---|---|
| State Street Master Funds - State Street U.S. Government Money Market Portfolio | 7.66% |
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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