IBMU vs SPY
iShares iBonds Dec 2032 Term Muni Bond ETF vs State Street SPDR S&P 500 ETF Trust
Which is better, IBMU or SPY?
SPY costs less.
SPY has a lower expense ratio.
MarketXLS is not an investment adviser. This comparison is generated automatically from market data and is for information only. A Best mark means the better reading on that one measure, not a recommendation to buy.
Side-by-Side Comparison
| Metric | IBMU | SPY |
|---|---|---|
| Expense Ratio | 0.18% | 0.09%Best |
| AUM | $17M | $804.7B |
| Dividend Yield | 0.81% | 0.98% |
| Holdings | 391 | 505 |
| YTD Return | -1.66% | +12.47%Best |
| 1Y Return | - | +17.51% |
| 3Y Return (annualized) | - | +21.18% |
| 5Y Return (annualized) | - | +12.88% |
| Fund Family | iShares by BlackRock (US) | State Street Investment Management |
| Category | Fixed Income | Equity |
| Style | - | Large Cap Blend |
| Inception | Mar 25, 2026 | Jan 22, 1993 |
Not shown on this pair: Volatility (annualized), Max Drawdown, $10,000 over the window, Top 10 Weight.
IBMU vs SPY growth
Month-end closes. Both lines start at 0% in the first month shown, so the gap between them is the difference in growth across that window. The full view is available from the range buttons; it is not the opening view here because over the whole period one of these two funds moves so much further than the other that its line would sit flat on the axis.
IBMU vs SPY Performance
iShares iBonds Dec 2032 Term Muni Bond ETF (IBMU) is an ETF from iShares by BlackRock (US) and State Street SPDR S&P 500 ETF Trust (SPY) is an ETF from State Street Investment Management. Year to date, IBMU is down 1.66% versus a gain of 12.47% for SPY.
Past performance does not guarantee future results.
Fees and Cost Over Time
IBMU 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, IBMU currently yields 0.81% against 0.98% for SPY.
Holdings Overlap
We hold position weights for 74 holdings in IBMU and 504 in SPY, totalling 20.6% and 100.0% of the two funds. The two books name no position in common, so there is no overlap percentage to show.
0 positions in common, counted across the 74 positions we hold weights for in IBMU and 504 in SPY, against full books of 391 and 505.
You are not choosing between two funds in isolation.
Whichever of IBMU and SPY you pick has to sit alongside everything else you own. Add the rest and see what the combination actually holds.
Free for up to 10 holdings. No account needed.
Frequently Asked Questions
Which is cheaper, IBMU or SPY?
IBMU has an expense ratio of 0.18% while SPY charges 0.09%. SPY is the cheaper option, by $9 a year on a $10,000 investment.
Which pays a higher dividend, IBMU or SPY?
IBMU yields 0.81% while SPY yields 0.98%, so SPY currently pays the higher dividend yield.
Is SPY better than IBMU?
SPY has a lower expense ratio. Which one suits a particular account depends on what it is for. This is information, not a recommendation.