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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
10/27/2026: SPMB (3-star) is currently NOT-A-BUY. Pass it for now.
SPMB provides efficient, low-cost exposure to the U.S. investment-grade agency mortgage-backed securities market. It achieves this by tracking the Bloomberg U.S. MBS Index, holding high-quality pass-through securities backed by government agencies. Its primary strengths are its ultra-low expense ratio and high credit quality, making it an excellent tool for income-focused investors looking to complement their Treasury or corporate bond holdings. Investors should be aware of interest-rate risk and prepayment risk, which are the main factors affecting the fund's price. It is best suited for conservative to moderate, long-term investors monitoring the Fed's interest rate trajectory.
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 fixed-income stability rather than the capital appreciation sought by growth investors. |
| Momentum investor | Weak fit | As a passive bond ETF, it does not typically exhibit the price trends favored by momentum strategies. |
| Value investor | Mixed fit | Value investors may look at the yield spread of MBS versus Treasuries, but the fund is not a traditional value equity product. |
| Dividend/Income investor | Strong fit | It offers a reliable stream of monthly income derived from the interest payments of mortgage-backed securities. |
| Low-risk investor | Strong fit | Because the holdings are primarily agency-backed, the credit risk is very low, making it suitable for conservative portfolios. |
Investor Profile
Ideal Investor Profile
Income-focused investors seeking exposure to government-backed mortgage securities with a low cost of ownership.
Suitability
Best for long-term investors looking to build a diversified income-generating portfolio rather than active traders.
Risk Profile
| Risk factor | Level | Why it matters |
|---|---|---|
| Volatility | Medium | While credit risk is low, the price of the fund fluctuates significantly with changes in interest rates. |
| Market risk | Medium | The value of the underlying MBS can decline if market interest rates rise significantly. |
| Concentration | High | The fund is concentrated entirely in one asset class, mortgage-backed securities. |
| Tracking/expense | Low | The fund has a very low expense ratio and maintains tight tracking to its benchmark. |
| Liquidity | Low | The underlying securities are generally liquid, providing a stable trading environment. |
| Business/sector quality | Low | The agency-backed nature of the holdings provides high quality. |
Risk Analysis
Volatility
SPMB exhibits volatility consistent with intermediate-duration fixed-income instruments, primarily driven by interest rate fluctuations.
Market Risk
The fund carries 'duration risk' (sensitivity to interest rates) and 'prepayment risk' (the risk that homeowners refinance early), typical of MBS products.
What the ETF Owns
| Exposure Type | Exposure | Weight (%) | Retail Investor Read |
|---|---|---|---|
| Fixed-income type | US Agency Mortgage-Backed Pass-Through Securities | 99.5 | These securities are backed by government-sponsored enterprises, offering high credit quality and exposure to the housing market. |
| Cash/collateral | Cash and Cash Equivalents | 0.5 | A small portion of the fund is held in cash to manage daily liquidity needs and subscription/redemption activity. |
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 11.93% | 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 10/27/2026 |
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