GMOC vs. SPTU

Last updated Jun 6, 2026

GMOC (GMO Ultra-Short Income ETF) and SPTU (State Street SPDR Portfolio Ultra Short T-Bill ETF) are both Ultrashort Bond funds. GMOC is actively managed, while SPTU is passively managed. At a 0.04 correlation, their price movements are largely independent. GMOC charges 0.20%/yr vs 0.05%/yr for SPTU.

Performance

GMOC vs. SPTU - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in GMO Ultra-Short Income ETF (GMOC) 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, GMOC achieves a 1.65% return, which is significantly higher than SPTU's 1.52% return.

GMOC

• 1D: 0.00%
• 1M: 0.27%
• YTD: 1.65%
• 6M: 2.00%
• 1Y: —
• 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)

GMOC vs. SPTU - Yearly Performance Comparison

	2026 (YTD)	2025
GMOC GMO Ultra-Short Income ETF	1.65%	0.76%
SPTU State Street SPDR Portfolio Ultra Short T-Bill ETF	1.52%	0.69%

Correlation

The correlation between GMOC 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 29, 2025	0.04

Return for Risk

GMOC vs. SPTU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for GMO Ultra-Short Income ETF (GMOC) 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	GMOC	SPTU	Difference
Sharpe Ratio (All Time) Calculated using the full available price history	8.33	11.87	-3.54

Drawdowns

GMOC vs. SPTU - Drawdown Comparison

The maximum GMOC drawdown since its inception was -0.13%, which is greater than SPTU's maximum drawdown of -0.04%. Use the drawdown chart below to compare losses from any high point for GMOC and SPTU.

Drawdown Indicators

	GMOC	SPTU	Difference
Max Drawdown Largest peak-to-trough decline	-0.13%	-0.04%	-0.09%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.01%	-0.00%	-0.01%

Volatility

Volatility by Period

	GMOC	SPTU	Difference
Volatility (1Y) Calculated over the trailing 1-year period	0.49%	0.32%	+0.17%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.49%	0.32%	+0.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.49%	0.32%	+0.17%

GMOC vs. SPTU - Expense Ratio Comparison

GMOC has a 0.20% 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

GMOC vs. SPTU - Dividend Comparison

GMOC's dividend yield for the trailing twelve months is around 2.33%, less than SPTU's 2.36% yield.

Position	TTM	2025
GMOC GMO Ultra-Short Income ETF	2.33%	0.84%
SPTU State Street SPDR Portfolio Ultra Short T-Bill ETF	2.36%	0.89%

Frequently Asked Questions

Can I hold both GMOC and SPTU in my portfolio?

GMOC 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, GMOC 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, GMOC or SPTU?

SPTU is cheaper with a 0.05% expense ratio, compared with 0.20% for GMOC.

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

SPTU has the higher dividend yield at 2.36%, compared with 2.33% for GMOC.

What is the main difference between GMOC and SPTU?

They also come from different issuers: GMO and State Street. Their fees differ too: 0.20% for GMOC and 0.05% for SPTU.