IBDY vs SPY
iShares iBonds Dec 2033 Term Corporate ETF vs State Street SPDR S&P 500 ETF Trust
Which is better, IBDY or SPY?
SPY has been ahead.
SPY has a lower expense ratio. SPY led over 1Y, 3Y and the full window.
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 | IBDY | SPY |
|---|---|---|
| Expense Ratio | 0.10% | 0.09%Best |
| AUM | $1.2B | $804.7B |
| Dividend Yield | 4.96% | 0.98% |
| Holdings | 404 | 505 |
| YTD Return | -2.22% | +12.99%Best |
| 1Y Return | -1.24% | +16.73%Best |
| 3Y Return (annualized) | +5.84% | +22.52%Best |
| 5Y Return (annualized) | - | +13.07% |
| Volatility (annualized) | 6.7%Best | 12.6% |
| Max Drawdown | -7.5%Best | -18.8% |
| $10,000 over 3.3 years | $11,556 | $18,559Best |
| Fund Family | iShares by BlackRock (US) | State Street Investment Management |
| Category | Fixed Income | Equity |
| Style | - | Large Cap Blend |
| Inception | Jun 21, 2023 | Jan 22, 1993 |
Not shown on this pair: Top 10 Weight.
Volatility and max drawdown, and the $10,000 over 3.3 years row, are measured over the window both funds cover: Jun 23, 2023 to Sep 23, 2026 (3.3 years).
IBDY 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 covers the 3.3 years both funds cover.
IBDY vs SPY Performance
iShares iBonds Dec 2033 Term Corporate ETF (IBDY) 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. Over the past year IBDY returned -1.24% while SPY returned +16.73%. Year to date, IBDY is down 2.22% versus a gain of 12.99% for SPY.
Over three years, IBDY compounded at +5.84% per year against +22.52% for SPY.
Past performance does not guarantee future results.
Risk: Volatility and Drawdowns
SPY has been the more volatile fund, with annualized monthly volatility of 12.6% compared with 6.7% for IBDY. Lower volatility generally means a smoother ride, though it often comes with lower long-run returns.
The deepest peak-to-trough decline in our data was -7.5% for IBDY and -18.8% for SPY. Drawdown depth is what each fund did in the worst stretch of the window measured above.
The two funds' monthly returns correlate at 0.60. They move together some of the time, and apart the rest.
Fees and Cost Over Time
IBDY charges 0.10% per year while SPY charges 0.09%. On a $10,000 position that is $10 vs $9 annually, a gap of $1 per year that compounds over a long holding period. On income, IBDY currently yields 4.96% against 0.98% for SPY.
Holdings Overlap
At least 0.1% of SPY's money is in holdings IBDY also owns.
Stated as a floor: for IBDY, our book for it covers 72.5% of that fund, so a holding it does not list is one we cannot count as shared. The real figure is this or higher.
We cannot see either book well enough to say how much of this pair is duplicated.
1 positions in common, counted across the 314 positions we hold weights for in IBDY and 504 in SPY, against full books of 404 and 505.
Top Shared Holdings
| Stock | Weight in IBDY | Weight in SPY | Difference |
|---|---|---|---|
| AONAon Corp/Aon Glo 5.35 02/28/2033 | 0.22% | 0.11% | 0.11% |
You are not choosing between two funds in isolation.
Whichever of IBDY 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, IBDY or SPY?
IBDY has an expense ratio of 0.10% while SPY charges 0.09%. SPY is the cheaper option, by $1 a year on a $10,000 investment.
Which performed better, IBDY or SPY?
Over the past year IBDY returned -1.24% vs +16.73% for SPY, so SPY leads on 1-year performance. Past performance does not guarantee future results. This is information, not a recommendation.
Which is riskier, IBDY or SPY?
SPY has been the more volatile fund at 12.6% annualized versus 6.7% for IBDY. Worst drawdown: IBDY -7.5% vs SPY -18.8%.
Should I hold both IBDY and SPY?
IBDY and SPY have a monthly-return correlation of 0.60, so their returns are far enough apart for the mix to behave differently from either one alone. This is information, not a recommendation.
Which pays a higher dividend, IBDY or SPY?
IBDY yields 4.96% while SPY yields 0.98%, so IBDY currently pays the higher dividend yield.
Is SPY better than IBDY?
SPY has a lower expense ratio. SPY led over 1Y, 3Y and the full window. Which one suits a particular account depends on what it is for. This is information, not a recommendation.