A side-by-side comparison of iShares GNMA Bond ETF (GNMA) and Vanguard Mortgage-Backed Securities Index Fund ETF Shares (VMBS) to help Canadian investors make an informed decision.
1-Year Performance
Normalised to 100 at the start — shows relative return over the trailing 12 months.
Head-to-Head Comparison
| Metric | GNMA | VMBS |
|---|---|---|
| YTD Return | -1.98% | -1.84%✓ |
| 1-Day Change | -0.79%✓ | -0.81% |
| 1-Week Change | -0.27% | -0.18%✓ |
| 1-Month Change | +1.91%✓ | +1.57% |
| Current Price | $42.66 | $45.26 |
| AUM | $432M | $16.11B✓ |
| MER (Expense Ratio) | 0.1% | 0.04%✓ |
| Dividend Yield | 4.21%✓ | 4.18% |
| Distribution Frequency | — | — |
| Inception Date | 2012-02-14 | 2009-11-19 |
| Holdings Count | 1 | 6 |
| MorningStar Rating | — | — |
| Category | Mortgage-Backed & Securitized Bonds | Mortgage-Backed & Securitized Bonds |
| Beta | 1.09 | 1.12 |
| 52-Week High | $44.08 | $46.39 |
| 52-Week Low | $40.99 | $43.79 |
| 50-Day MA | $42.52 | $45.13 |
| 200-Day MA | $43.81 | $46.38 |
✓ marks the better value for return/yield/AUM metrics. Lower ✓ for MER.
Annualised Returns
| Period | GNMA | VMBS |
|---|---|---|
| YTD | -1.98% | -1.84%✓ |
| 1 Year | +0.80%✓ | +0.40% |
| 3 Year | +5.46%✓ | +5.36% |
| 5 Year | +0.47%✓ | +0.36% |
| 10 Year | +1.05% | +1.26%✓ |
| 1Y Volatility | 5.39% | 5.54% |
| Sharpe Ratio (3Y) | 0.24 | 0.31 |
Past performance is not a guarantee of future results.
Top 10 Holdings
| 1 | XTSLA | BlackRock Cash Funds Treasury SL Agency | 6.91% |
| 1 | Federal National Mortgage Association 2.5% | 2.25% | |
| 2 | Federal National Mortgage Association 2.43% | 1.76% | |
| 3 | Government National Mortgage Association 2.43% | 0.72% | |
| 4 | Federal National Mortgage Association | 0.64% | |
| 5 | Federal National Mortgage Association 3.43% | 0.64% | |
| 6 | Federal Home Loan Mortgage Corporation | 0.63% |
Sector Weights
| Sector | GNMA | VMBS |
|---|---|---|
| Basic Materials | 0.00% | 0.00% |
| Communication Services | 0.00% | 0.00% |
| Consumer Cyclicals | 0.00% | 0.00% |
| Consumer Defensive | 0.00% | 0.00% |
| Energy | 0.00% | 0.00% |
| Financial Services | 0.00% | 0.00% |
| Healthcare | 0.00% | 0.00% |
| Industrials | 0.00% | 0.00% |
| Real Estate | 0.00% | 0.00% |
| Technology | 0.00% | 0.00% |
| Utilities | 0.00% | 0.00% |
About GNMA
The fund will invest at least 80% of its assets in the component securities of the underlying index and to-be-announced transactions ("TBAs") that have economic characteristics that are substantially identical to the economic characteristics of the component securities of the underlying index. The underlying index includes fixed-rate MBS issued by GNMA that have 30- or 15-year maturities. The index measures the performance of mortgage-backed pass-through securities issued by GNMA.
About VMBS
The fund manager employs an indexing investment approach designed to track the performance of the Bloomberg U.S. MBS Float Adjusted Index. This index covers U.S. agency mortgage-backed pass-through securities issued by the GNMA, the FNMA, and the FHLMC. To be included in the index, pool aggregates must have at least $1 billion currently outstanding and a weighted average maturity of at least 1 year. All of the fund's investments will be selected through the sampling process, and at least 80% of …
Which ETF is Right for You?
Both GNMA and VMBS are listed on Canadian exchanges and accessible through most Canadian brokerages including Questrade, Wealthsimple Trade, TD Direct, and Interactive Brokers.
Based on the available data, VMBS scores higher across our tracked metrics including YTD performance, dividend yield, and AUM — though both ETFs warrant individual research before investing.
- Consider your account type (TFSA, RRSP, non-registered) as it can affect dividend taxation.
- Compare management expense ratios (MER) directly on each provider's website.
- Look at average daily trading volume to assess liquidity.
- Review the fund's underlying index and holdings to ensure the exposure matches your goals.
This is not financial advice. Always do your own research or consult a licensed financial advisor before investing.
Frequently Asked Questions
What is the difference between GNMA and VMBS?
GNMA (iShares GNMA Bond ETF) and VMBS (Vanguard Mortgage-Backed Securities Index Fund ETF Shares) are both Canadian-listed ETFs. Key differences include their AUM ($432M vs $16.11B), dividend yield (4.21% vs 4.18%), and year-to-date performance (-1.98% vs -1.84%).
Is GNMA better than VMBS?
There is no single "better" ETF — it depends on your investment goals. If you prioritise dividends, compare both yields and choose based on your income needs. Always review the fund's prospectus and consider your tax situation.
Can I buy GNMA and VMBS on Wealthsimple?
Most Canadian-listed ETFs are available on Wealthsimple Trade commission-free. Both GNMA and VMBS should be accessible. Check Wealthsimple's supported tickers list to confirm availability.
Free newsletter · Every Saturday morning
The Saturday TSX Wrap
The week on the TSX, in five minutes.
- The biggest gainers and losers, and why they moved
- Sector and momentum moves at a glance
- The Canadian market stories you missed