BUXX vs. SPTU

Last updated Jun 6, 2026

BUXX (Strive Enhanced Income Short Maturity ETF) and SPTU (State Street SPDR Portfolio Ultra Short T-Bill ETF) are both Ultrashort Bond funds. BUXX is actively managed, while SPTU is passively managed. At a 0.04 correlation, their price movements are largely independent. BUXX charges 0.26%/yr vs 0.05%/yr for SPTU.

Performance

BUXX vs. SPTU - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Strive Enhanced Income Short Maturity ETF (BUXX) and State Street SPDR Portfolio Ultra Short T-Bill ETF (SPTU). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BUXX achieves a 1.61% return, which is significantly higher than SPTU's 1.52% return.

BUXX

• 1D: 0.00%
• 1M: 0.31%
• YTD: 1.61%
• 6M: 1.99%
• 1Y: 4.35%
• 3Y*: —
• 5Y*: —
• 10Y*: —

SPTU

• 1D: 0.04%
• 1M: 0.33%
• YTD: 1.52%
• 6M: 1.77%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

*Multi-year figures are annualized to reflect compound growth (CAGR)

BUXX vs. SPTU - Yearly Performance Comparison

	2026 (YTD)	2025
BUXX Strive Enhanced Income Short Maturity ETF	1.61%	0.97%
SPTU State Street SPDR Portfolio Ultra Short T-Bill ETF	1.52%	0.92%

Correlation

The correlation between BUXX and SPTU is 0.04, 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 9, 2025	0.04

Return for Risk

BUXX vs. SPTU — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

BUXX

BUXX Risk / Return Rank: 97
BUXX Sharpe Ratio Rank: 95
BUXX Sortino Ratio Rank: 97
BUXX Omega Ratio Rank: 97
BUXX Calmar Ratio Rank: 98
BUXX Martin Ratio Rank: 98

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

BUXX vs. SPTU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Strive Enhanced Income Short Maturity ETF (BUXX) 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.

	BUXX	SPTU	Difference
Sharpe ratio: Return per unit of total volatility	3.60	—	—
Sortino ratio: Return per unit of downside risk	6.09	—	—
Omega ratio: Gain probability vs. loss probability	1.87	—	—
Calmar ratio: Return relative to maximum drawdown	14.85	—	—
Martin ratio: Return relative to average drawdown	61.16	—	—
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

Sharpe Ratios by Period

	BUXX	SPTU	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.60	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	3.82	11.87	-8.05

Drawdowns

BUXX vs. SPTU - Drawdown Comparison

The maximum BUXX drawdown since its inception was -0.60%, which is greater than SPTU's maximum drawdown of -0.04%. Use the drawdown chart below to compare losses from any high point for BUXX and SPTU.

Drawdown Indicators

	BUXX	SPTU	Difference
Max Drawdown Largest peak-to-trough decline	-0.60%	-0.04%	-0.56%
Max Drawdown (1Y) Largest decline over 1 year	-0.29%	—	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.05%	-0.00%	-0.05%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.07%	—	—

Volatility

Volatility by Period

	BUXX	SPTU	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.30%	—	—
Volatility (6M) Calculated over the trailing 6-month period	0.78%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	1.22%	0.32%	+0.90%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.46%	0.32%	+1.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.46%	0.32%	+1.14%

BUXX vs. SPTU - Expense Ratio Comparison

BUXX has a 0.26% 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

BUXX vs. SPTU - Dividend Comparison

BUXX's dividend yield for the trailing twelve months is around 4.73%, more than SPTU's 2.36% yield.

Position	TTM	2025	2024	2023
BUXX Strive Enhanced Income Short Maturity ETF	4.73%	4.95%	5.55%	1.92%
SPTU State Street SPDR Portfolio Ultra Short T-Bill ETF	2.36%	0.89%	0.00%	0.00%

Frequently Asked Questions

Can I hold both BUXX and SPTU in my portfolio?

BUXX and SPTU have a correlation of 0.04, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, BUXX or SPTU?

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.

Which ETF is cheaper, BUXX or SPTU?

SPTU is cheaper with a 0.05% expense ratio, compared with 0.26% for BUXX.

Which ETF pays a higher dividend yield, BUXX or SPTU?

BUXX has the higher dividend yield at 4.73%, compared with 2.36% for SPTU.

What is the main difference between BUXX and SPTU?

They also come from different issuers: Strive and State Street. Their fees differ too: 0.26% for BUXX and 0.05% for SPTU.