IBMX vs SPY
iShares iBonds Dec 2035 Term Muni Bond ETF vs State Street SPDR S&P 500 ETF Trust
Quick Verdict
SPY has a lower expense ratio. SPY offers more diversification with 503 holdings.
Side-by-Side Comparison
| Metric | IBMX | SPY | Winner |
|---|---|---|---|
| Expense Ratio | 0.18% | 0.09% | |
| AUM | $5M | $789.1B | |
| Dividend Yield | 0.34% | 1.01% | |
| Holdings | 141 | 505 | |
| YTD Return | -1.56% | +13.39% | |
| 1Y Return | - | +22.52% | |
| 3Y Return (annualized) | - | +21.36% | |
| 5Y Return (annualized) | - | +13.19% | |
| Volatility (annualized) | - | 15.3% | |
| Max Drawdown | -2.9% | -56.5% | |
| Fund Family | iShares by BlackRock (US) | State Street Investment Management | |
| Category | Fixed Income | Equity | |
| Inception | Apr 14, 2026 | Jan 22, 1993 |
IBMX vs SPY Performance
iShares iBonds Dec 2035 Term Muni Bond ETF (IBMX) is a ETF from iShares by BlackRock (US) and State Street SPDR S&P 500 ETF Trust (SPY) is a ETF from State Street Investment Management. Year to date, IBMX is down 1.56% versus a gain of 13.39% for SPY.
Risk: Volatility and Drawdowns
The deepest peak-to-trough decline in our data was -2.9% for IBMX and -56.5% for SPY. Drawdown depth is worth weighing if you expect to sell during market stress rather than ride it out.
Fees and Cost Over Time
IBMX charges 0.18% per year while SPY charges 0.09%. On a $10,000 position that is $18 vs $9 annually, a gap of $9 per year that compounds over a long holding period. On income, IBMX currently yields 0.34% against 1.01% for SPY.
Holdings Overlap
IBMX and SPY share 0 holdings out of 533 unique holdings combined, representing a 0.0% weight overlap.
Moderate overlap means holding both could provide meaningful diversification benefits.
Frequently Asked Questions
Which is cheaper, IBMX or SPY?
IBMX has an expense ratio of 0.18% while SPY charges 0.09%. SPY is the cheaper option. On a $10,000 investment, that is $9 per year of difference.
What is the holdings overlap between IBMX and SPY?
IBMX and SPY share 0 common holdings with a 0.0% weight overlap. Combined, they hold 533 unique securities.
Which pays a higher dividend, IBMX or SPY?
IBMX yields 0.34% while SPY yields 1.01%, so SPY currently pays the higher dividend yield.
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