RBIL vs SPY
F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF vs State Street SPDR S&P 500 ETF Trust
Quick Verdict
SPY has a lower expense ratio. SPY delivered stronger 1-year returns. SPY offers more diversification with 503 holdings.
Side-by-Side Comparison
| Metric | RBIL | SPY | Winner |
|---|---|---|---|
| Expense Ratio | 0.17% | 0.09% | |
| AUM | $153M | $789.1B | |
| Dividend Yield | 4.38% | 1.01% | |
| Holdings | 6 | 505 | |
| YTD Return | +2.62% | +13.39% | |
| 1Y Return | +3.79% | +22.52% | |
| 3Y Return (annualized) | - | +21.36% | |
| 5Y Return (annualized) | - | +13.19% | |
| Volatility (annualized) | 1.0% | 15.3% | |
| Max Drawdown | -0.6% | -56.5% | |
| Fund Family | US Benchmark Series | State Street Investment Management | |
| Category | Fixed Income | Equity | |
| Inception | Feb 24, 2025 | Jan 22, 1993 |
RBIL vs SPY Performance
F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL) is a ETF from US Benchmark Series and State Street SPDR S&P 500 ETF Trust (SPY) is a ETF from State Street Investment Management. Over the past year RBIL returned +3.79% while SPY returned +22.52%. Year to date, RBIL is up 2.62% versus a gain of 13.39% for SPY.
Risk: Volatility and Drawdowns
SPY has been the more volatile fund, with annualized monthly volatility of 15.3% compared with 1.0% for RBIL. 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 -0.6% for RBIL and -56.5% for SPY. Drawdown depth is worth weighing if you expect to sell during market stress rather than ride it out.
The two funds' monthly returns correlate at -0.39. They move independently enough that combining them can meaningfully diversify a portfolio.
Fees and Cost Over Time
RBIL charges 0.17% per year while SPY charges 0.09%. On a $10,000 position that is $17 vs $9 annually, a gap of $8 per year that compounds over a long holding period. On income, RBIL currently yields 4.38% against 1.01% for SPY.
Holdings Overlap
RBIL and SPY share 0 holdings out of 508 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, RBIL or SPY?
RBIL has an expense ratio of 0.17% while SPY charges 0.09%. SPY is the cheaper option. On a $10,000 investment, that is $8 per year of difference.
Which performed better, RBIL or SPY?
Over the past year RBIL returned +3.79% vs +22.52% for SPY, so SPY leads on 1-year performance. Over the longest common window we track (2 years), RBIL annualized +4.16% vs +8.84% for SPY. Past performance does not guarantee future results.
Which is riskier, RBIL or SPY?
SPY has been the more volatile fund at 15.3% annualized versus 1.0% for RBIL. Worst drawdown: RBIL -0.6% vs SPY -56.5%.
Should I hold both RBIL and SPY?
RBIL and SPY have a monthly-return correlation of -0.39, so combining them can provide real diversification depending on your allocation goals.
What is the holdings overlap between RBIL and SPY?
RBIL and SPY share 0 common holdings with a 0.0% weight overlap. Combined, they hold 508 unique securities.
Which pays a higher dividend, RBIL or SPY?
RBIL yields 4.38% while SPY yields 1.01%, so RBIL currently pays the higher dividend yield.
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