TMB vs. COMT

Last updated Jun 25, 2026

TMB (Thornburg Multi Sector Bond ETF) and COMT (iShares GSCI Commodity Dynamic Roll Strategy ETF) are both exchange-traded funds - TMB is a Multisector Bonds fund actively managed by Thornburg, while COMT is a Commodities fund tracking the S&P GSCI Dynamic Roll (USD) Total Return Index. TMB is actively managed, while COMT is passively managed. At a correlation of -0.40, they often move in opposite directions. TMB charges 0.55%/yr vs 0.48%/yr for COMT.

Performance

TMB vs. COMT - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Thornburg Multi Sector Bond ETF (TMB) and iShares GSCI Commodity Dynamic Roll Strategy ETF (COMT). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

TMB

• 1D: 0.16%
• 1M: 0.68%
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

COMT

• 1D: -2.37%
• 1M: -14.00%
• YTD: 20.95%
• 6M: 19.91%
• 1Y: 25.37%
• 3Y*: 11.11%
• 5Y*: 10.23%
• 10Y*: 7.70%

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

TMB vs. COMT - Yearly Performance Comparison

	2026 (YTD)
TMB Thornburg Multi Sector Bond ETF	0.68%
COMT iShares GSCI Commodity Dynamic Roll Strategy ETF	-14.00%

Correlation

The correlation between TMB and COMT is -0.40, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (All Time) Calculated using the full available price history since May 26, 2026	-0.40

Return for Risk

TMB vs. COMT — Risk / Return Rank

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

TMB

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

COMT

COMT Risk / Return Rank: 37
COMT Sharpe Ratio Rank: 36
COMT Sortino Ratio Rank: 35
COMT Omega Ratio Rank: 36
COMT Calmar Ratio Rank: 31
COMT Martin Ratio Rank: 45

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.

TMB vs. COMT - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Thornburg Multi Sector Bond ETF (TMB) and iShares GSCI Commodity Dynamic Roll Strategy ETF (COMT). 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.

	TMB	COMT	Difference
Sharpe ratio: Return per unit of total volatility	—	1.21	—
Sortino ratio: Return per unit of downside risk	—	1.72	—
Omega ratio: Gain probability vs. loss probability	—	1.22	—
Calmar ratio: Return relative to maximum drawdown	—	1.45	—
Martin ratio: Return relative to average drawdown	—	6.71	—

Drawdowns

TMB vs. COMT - Drawdown Comparison

The maximum TMB drawdown since its inception was -0.59%, smaller than the maximum COMT drawdown of -51.89%. Use the drawdown chart below to compare losses from any high point for TMB and COMT.

Drawdown Indicators

	TMB	COMT	Difference
Max Drawdown Largest peak-to-trough decline	-0.59%	-51.89%	+51.30%
Max Drawdown (1Y) Largest decline over 1 year	—	-17.57%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-17.57%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-29.00%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-39.22%	—
Current Drawdown Current decline from peak	-0.14%	-17.57%	+17.43%
Average Drawdown Average peak-to-trough decline	-0.17%	-24.00%	+23.83%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	3.79%	—

Volatility

Volatility by Period

	TMB	COMT	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	5.32%	—
Volatility (6M) Calculated over the trailing 6-month period	—	19.40%	—
Volatility (1Y) Calculated over the trailing 1-year period	3.52%	21.28%	-17.76%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.52%	21.15%	-17.63%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.52%	18.87%	-15.35%

TMB vs. COMT - Expense Ratio Comparison

TMB has a 0.55% expense ratio, which is higher than COMT's 0.48% expense ratio.

Dividends

TMB vs. COMT - Dividend Comparison

TMB's dividend yield for the trailing twelve months is around 0.36%, less than COMT's 6.40% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COMT iShares GSCI Commodity Dynamic Roll Strategy ETF	6.40%	7.74%	4.90%	5.19%	29.79%	17.79%	0.36%	2.61%	11.65%	5.16%	0.52%	1.44%
TMB Thornburg Multi Sector Bond ETF	0.36%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both TMB and COMT in my portfolio?

TMB and COMT have a correlation of -0.40, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, TMB or COMT?

On fees, COMT is cheaper at 0.48% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, TMB or COMT?

COMT is cheaper with a 0.48% expense ratio, compared with 0.55% for TMB.

Which ETF pays a higher dividend yield, TMB or COMT?

COMT has the higher dividend yield at 6.40%, compared with 0.36% for TMB.

What is the main difference between TMB and COMT?

TMB is categorized as Multisector Bonds, while COMT is Commodities. They also come from different issuers: Thornburg and iShares. Their fees differ too: 0.55% for TMB and 0.48% for COMT.