FLOT vs. SPTU
FLOT (iShares Floating Rate Bond ETF) and SPTU (State Street SPDR Portfolio Ultra Short T-Bill ETF) are both Ultrashort Bond funds - FLOT tracks the Bloomberg US Floating Rate Note < 5 Years Index while SPTU tracks the ICE BofA US Treasury Bill Index. Both are passively managed. At a 0.11 correlation, their price movements are largely independent. FLOT charges 0.15%/yr vs 0.05%/yr for SPTU.
Performance
FLOT vs. SPTU - Performance Comparison
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Returns By Period
In the year-to-date period, FLOT achieves a 2.29% return, which is significantly higher than SPTU's 1.90% return.
FLOT
- 1D
- -0.02%
- 1M
- 0.30%
- 6M
- 2.15%
- YTD
- 2.29%
- 1Y
- 4.62%
- 3Y*
- 5.59%
- 5Y*
- 4.27%
- 10Y*
- 3.05%
SPTU
- 1D
- 0.04%
- 1M
- 0.30%
- 6M
- 1.78%
- YTD
- 1.90%
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
FLOT vs. SPTU - Yearly Performance Comparison
| 2026 (YTD) | 2025 | |
|---|---|---|
FLOT iShares Floating Rate Bond ETF | 2.29% | 1.05% |
SPTU State Street SPDR Portfolio Ultra Short T-Bill ETF | 1.90% | 0.87% |
Correlation
The correlation between FLOT and SPTU is 0.11, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Oct 8, 2025 | 0.11 |
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Return for Risk
FLOT vs. SPTU — Risk / Return Rank
FLOT
SPTU
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
FLOT vs. SPTU - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Floating Rate Bond ETF (FLOT) and State Street SPDR Portfolio Ultra Short T-Bill ETF (SPTU). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| FLOT | SPTU | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | 3.04 | — | — |
| Calmar ratioReturn relative to maximum drawdown | 10.76 | — | — |
| Martin ratioReturn relative to average drawdown | 99.49 | — | — |
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Drawdowns
FLOT vs. SPTU - Drawdown Comparison
The maximum FLOT drawdown since its inception was -13.54%, which is greater than SPTU's maximum drawdown of -0.04%. Use the drawdown chart below to compare losses from any high point for FLOT and SPTU.
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Drawdown Indicators
| FLOT | SPTU | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -13.54% | -0.04% | -13.50% |
Max Drawdown (1Y)Largest decline over 1 year | -0.43% | — | — |
Max Drawdown (3Y)Largest decline over 3 years | -1.57% | — | — |
Max Drawdown (5Y)Largest decline over 5 years | -2.36% | — | — |
Max Drawdown (10Y)Largest decline over 10 years | -13.54% | — | — |
Current DrawdownCurrent decline from peak | -0.02% | 0.00% | -0.02% |
Average DrawdownAverage peak-to-trough decline | -0.21% | -0.00% | -0.21% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.05% | — | — |
Volatility
FLOT vs. SPTU - Volatility Comparison
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Volatility by Period
| FLOT | SPTU | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.15% | — | — |
Volatility (6M)Calculated over the trailing 6-month period | 0.63% | — | — |
Volatility (1Y)Calculated over the trailing 1-year period | 0.75% | 0.32% | +0.43% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 1.78% | 0.32% | +1.46% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.15% | 0.32% | +3.83% |
FLOT vs. SPTU - Expense Ratio Comparison
FLOT has a 0.15% expense ratio, which is higher than SPTU's 0.05% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
FLOT vs. SPTU - Dividend Comparison
FLOT's dividend yield for the trailing twelve months is around 4.47%, more than SPTU's 2.66% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FLOT iShares Floating Rate Bond ETF | 4.47% | 4.84% | 5.82% | 5.66% | 2.06% | 0.43% | 1.25% | 2.78% | 2.41% | 1.46% | 0.97% | 0.53% |
SPTU State Street SPDR Portfolio Ultra Short T-Bill ETF | 2.66% | 0.89% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
FLOT and SPTU have a correlation of 0.11, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, SPTU is cheaper at 0.05% per year. The better choice depends on whether you care most about return, fees, risk, or income.
SPTU is cheaper with a 0.05% expense ratio, compared with 0.15% for FLOT.
FLOT has the higher dividend yield at 4.47%, compared with 2.66% for SPTU.
FLOT tracks Bloomberg US Floating Rate Note < 5 Years Index, while SPTU tracks ICE BofA US Treasury Bill Index. They also come from different issuers: iShares and State Street. Their fees differ too: 0.15% for FLOT and 0.05% for SPTU.
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