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 0.07 correlation, their price movements are largely independent. FLOT charges 0.15%/yr vs 0.05%/yr for SPTU.
Performance
FLOT vs. SPTU - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, FLOT achieves a 2.01% return, which is significantly higher than SPTU's 1.66% return.
FLOT
- 1D
- -0.02%
- 1M
- 0.31%
- YTD
- 2.01%
- 6M
- 2.15%
- 1Y
- 4.74%
- 3Y*
- 5.59%
- 5Y*
- 4.22%
- 10Y*
- 3.04%
SPTU
- 1D
- 0.03%
- 1M
- 0.29%
- YTD
- 1.66%
- 6M
- 1.74%
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
FLOT vs. SPTU - Yearly Performance Comparison
| 2026 (YTD) | 2025 | |
|---|---|---|
FLOT iShares Floating Rate Bond ETF | 2.01% | 1.05% |
SPTU State Street SPDR Portfolio Ultra Short T-Bill ETF | 1.66% | 0.87% |
Correlation
The correlation between FLOT and SPTU is 0.07, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Oct 8, 2025 | 0.07 |
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
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 | 3.11 | — | — |
| Calmar ratioReturn relative to maximum drawdown | 11.03 | — | — |
| Martin ratioReturn relative to average drawdown | 102.10 | — | — |
Loading charts...
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.
Loading charts...
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
Loading charts...
Volatility by Period
| FLOT | SPTU | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.21% | — | — |
Volatility (6M)Calculated over the trailing 6-month period | 0.63% | — | — |
Volatility (1Y)Calculated over the trailing 1-year period | 0.75% | 0.33% | +0.42% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 1.78% | 0.33% | +1.45% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.15% | 0.33% | +3.82% |
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 4.53%, more than SPTU's 2.36% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FLOT iShares Floating Rate Bond ETF | 4.53% | 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 | 2.36% | 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 0.07, 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 4.53%, compared with 2.36% 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.
Find the right allocation for FLOT and SPTU
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer