SPY vs VIITX
State Street SPDR S&P 500 ETF Trust vs Vanguard Institutional Intermediate Term Bond Fund Institutional Plus Class
Which is better, SPY or VIITX?
Large Cap Blend against Intermediate Term Bond.
VIITX 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 | SPY | VIITX |
|---|---|---|
| Expense Ratio | 0.09% | 0.02%Best |
| AUM | $804.7B | - |
| Dividend Yield | 0.98% | 4.60% |
| Holdings | 505 | 2,599 |
| YTD Price Return | +10.93% | -2.73% |
| 1Y Price Return | +16.19% | -2.90% |
| 3Y Price Return (annualized) | +19.13% | +0.37% |
| 5Y Price Return (annualized) | +11.21% | -2.47% |
| Volatility (annualized) | 15.8% | 4.2%Best |
| Max Drawdown | -25.4% | -15.0%Best |
| Fund Family | State Street Investment Management | Vanguard (US) |
| Category | Equity | Fixed Income |
| Style | Large Cap Blend | Intermediate Term Bond |
| Inception | Jan 22, 1993 | Dec 1, 1997 |
Not shown on this pair: $10,000 over 5 years, Top 10 Weight.
A price return is not the return of a fund that pays its income out. The coupon or distribution never appears in the price, so the return rows carry no winner here. SPY currently yields 0.98% and VIITX 4.60%.
Volatility and max drawdown are measured over the window both funds cover: Sep 13, 2021 to Sep 9, 2026 (5 years).
SPY vs VIITX Performance
State Street SPDR S&P 500 ETF Trust (SPY) is an ETF from State Street Investment Management and Vanguard Institutional Intermediate Term Bond Fund Institutional Plus Class (VIITX) is a mutual fund from Vanguard (US). Over the past year SPY's price moved +16.19% and VIITX's -2.90%, before the income each one paid out.
Over three years, SPY compounded at +19.13% per year against +0.37% for VIITX; over five years the annualized figures are +11.21% and -2.47% respectively.
Past performance does not guarantee future results.
Risk: Volatility and Drawdowns
SPY has been the more volatile fund, with annualized monthly volatility of 15.8% compared with 4.2% for VIITX. 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 -25.4% for SPY and -15.0% for VIITX. Drawdown depth is what each fund did in the worst stretch of the window measured above.
The two funds' monthly returns correlate at 0.56. They move together some of the time, and apart the rest.
Fees and Cost Over Time
SPY charges 0.09% per year while VIITX charges 0.02%. On a $10,000 position that is $9 vs $2 annually, a gap of $7 per year that compounds over a long holding period. On income, SPY currently yields 0.98% against 4.60% for VIITX.
Structure and taxes
VIITX is a mutual fund and SPY is an ETF. A mutual fund prices once a day at net asset value and may carry a purchase minimum. An ETF trades through the day at whatever the market pays for it.
In a taxable account the difference that usually matters is distributions. An ETF can meet redemptions in kind, so it rarely has to sell holdings and rarely passes a capital gain to the people who held it; a mutual fund that sells holdings to meet redemptions can distribute a realised gain at year end to everyone still in the fund, whether or not they sold anything themselves. In a tax-deferred account that difference largely disappears. Both are descriptions of how the two wrappers work, not a recommendation.
Tax-loss harvesting works on either wrapper.
Holdings Overlap
At least 0.2% of SPY's money is in holdings VIITX also owns.
Stated as a floor: for VIITX, our book for it covers 52.5% 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.
The two holdings books were reported 96 days apart, SPY as of Aug 4, 2026 and VIITX as of Apr 30, 2026, so some of the difference between them is the time between the two reports rather than the funds.
2 positions in common, counted across the 504 positions we hold weights for in SPY and 1,285 in VIITX, against full books of 505 and 2,599.
You are not choosing between two funds in isolation.
Whichever of SPY and VIITX 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, SPY or VIITX?
SPY has an expense ratio of 0.09% while VIITX charges 0.02%. VIITX is the cheaper option, by $7 a year on a $10,000 investment.
Which is riskier, SPY or VIITX?
SPY has been the more volatile fund at 15.8% annualized versus 4.2% for VIITX. Worst drawdown: SPY -25.4% vs VIITX -15.0%.
Should I hold both SPY and VIITX?
SPY and VIITX have a monthly-return correlation of 0.56, 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, SPY or VIITX?
SPY yields 0.98% while VIITX yields 4.60%, so VIITX currently pays the higher dividend yield.
Is it better to hold VIITX or SPY in a taxable account?
SPY is an ETF and VIITX is a mutual fund. An ETF can meet redemptions in kind, so it rarely distributes a capital gain to the people holding it. A mutual fund that sells holdings to meet redemptions can pass a realised gain to every holder at year end. In a tax-deferred account that difference largely disappears. This is information, not a recommendation.
Is VIITX better than SPY?
VIITX has a lower expense ratio. Which one suits a particular account depends on what it is for. This is information, not a recommendation.