IBDZ vs SPY
iShares iBonds Dec 2034 Term Corporate ETF vs State Street SPDR S&P 500 ETF Trust
Which is better, IBDZ or SPY?
Long Term Bond against Large Cap Blend.
SPY has a lower expense ratio. SPY led over 1Y and the full window. IBDZ is less concentrated, with 8.1% of the fund in its ten largest positions against 37.8%.
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 | IBDZ | SPY |
|---|---|---|
| Expense Ratio | 0.10% | 0.09%Best |
| AUM | $852M | $804.7B |
| Dividend Yield | 4.94% | 0.98% |
| Holdings | 374 | 505 |
| YTD Return | -1.68% | +12.09%Best |
| 1Y Return | -0.81% | +16.29%Best |
| 3Y Return (annualized) | - | +21.20% |
| 5Y Return (annualized) | - | +13.37% |
| Volatility (annualized) | 4.5%Best | 11.8% |
| Max Drawdown | -5.6%Best | -18.8% |
| $10,000 over 2.3 years | $11,139 | $14,727Best |
| Top 10 Weight | 8.1%Best | 37.8% |
| Fund Family | iShares by BlackRock (US) | State Street Investment Management |
| Category | Fixed Income | Equity |
| Style | Long Term Bond | Large Cap Blend |
| Inception | May 22, 2024 | Jan 22, 1993 |
Volatility and max drawdown, and the $10,000 over 2.3 years row, are measured over the window both funds cover: May 24, 2024 to Sep 18, 2026 (2.3 years).
IBDZ 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 2.3 years both funds cover.
IBDZ vs SPY Performance
iShares iBonds Dec 2034 Term Corporate ETF (IBDZ) 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 IBDZ returned -0.81% while SPY returned +16.29%. Year to date, IBDZ is down 1.68% versus a gain of 12.09% 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 11.8% compared with 4.5% for IBDZ. 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 -5.6% for IBDZ 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 0.44. They move together some of the time, and apart the rest.
Fees and Cost Over Time
IBDZ 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, IBDZ currently yields 4.94% against 0.98% for SPY.
Holdings Overlap
0.2% of IBDZ's money is in holdings SPY also owns.
We cannot see either book well enough to say how much of this pair is duplicated.
1 positions in common, counted across the 360 positions we hold weights for in IBDZ and 504 in SPY, against full books of 374 and 505.
What only one of them owns
Measured across the 360 and 504 positions we hold weights for.
SPY holds 493 positions IBDZ does not, 99.3% of the fund.
Largest: NVDA 8.01%, AAPL 7.26%, MSFT 5.66%, AMZN 3.79%, GOOGL 2.99%
Top Shared Holdings
| Stock | Weight in IBDZ | Weight in SPY | Difference |
|---|---|---|---|
| MOSMosaic Co | 0.17% | 0.01% | 0.16% |
You are not choosing between two funds in isolation.
Whichever of IBDZ 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, IBDZ or SPY?
IBDZ 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, IBDZ or SPY?
Over the past year IBDZ returned -0.81% vs +16.29% for SPY, so SPY leads on 1-year performance. Over the longest common window we track (2 years), IBDZ annualized +4.80% vs +18.33% for SPY. Past performance does not guarantee future results. This is information, not a recommendation.
Which is riskier, IBDZ or SPY?
SPY has been the more volatile fund at 11.8% annualized versus 4.5% for IBDZ. Worst drawdown: IBDZ -5.6% vs SPY -18.8%.
Should I hold both IBDZ and SPY?
IBDZ and SPY have a monthly-return correlation of 0.44, 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, IBDZ or SPY?
IBDZ yields 4.94% while SPY yields 0.98%, so IBDZ currently pays the higher dividend yield.
Is SPY better than IBDZ?
SPY has a lower expense ratio. SPY led over 1Y and the full window. IBDZ is less concentrated, with 8.1% of the fund in its ten largest positions against 37.8%. Which one suits a particular account depends on what it is for. This is information, not a recommendation.