SIFI vs. TMB

Last updated Jun 3, 2026

SIFI (Harbor Scientific Alpha Income ETF) and TMB (Thornburg Multi Sector Bond ETF) are both Multisector Bonds funds. Both are actively managed. At a 0.30 correlation, their price movements are largely independent. SIFI charges 0.50%/yr vs 0.55%/yr for TMB.

Performance

SIFI vs. TMB - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Harbor Scientific Alpha Income ETF (SIFI) and Thornburg Multi Sector Bond ETF (TMB). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

SIFI

• 1D: 0.01%
• 1M: 0.30%
• YTD: 1.27%
• 6M: 1.70%
• 1Y: 7.56%
• 3Y*: 7.19%
• 5Y*: —
• 10Y*: —

TMB

• 1D: 0.10%
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

SIFI vs. TMB - Yearly Performance Comparison

	2026 (YTD)
SIFI Harbor Scientific Alpha Income ETF	0.18%
TMB Thornburg Multi Sector Bond ETF	0.40%

Correlation

The correlation between SIFI and TMB is 0.30, 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 May 27, 2026	0.30

Return for Risk

SIFI vs. TMB — Risk / Return Rank

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

SIFI

SIFI Risk / Return Rank: 66
SIFI Sharpe Ratio Rank: 67
SIFI Sortino Ratio Rank: 75
SIFI Omega Ratio Rank: 71
SIFI Calmar Ratio Rank: 54
SIFI Martin Ratio Rank: 61

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.

SIFI vs. TMB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Harbor Scientific Alpha Income ETF (SIFI) and Thornburg Multi Sector Bond ETF (TMB). 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.

	SIFI	TMB	Difference
Sharpe ratio Return per unit of total volatility	2.24	—	—
Sortino ratio Return per unit of downside risk	3.43	—	—
Omega ratio Gain probability vs. loss probability	1.43	—	—
Calmar ratio Return relative to maximum drawdown	2.74	—	—
Martin ratio Return relative to average drawdown	11.23	—	—
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

	SIFI	TMB	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.24	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.47	15.15	-14.68

Drawdowns

SIFI vs. TMB - Drawdown Comparison

The maximum SIFI drawdown since its inception was -14.68%, which is greater than TMB's maximum drawdown of -0.10%. Use the drawdown chart below to compare losses from any high point for SIFI and TMB.

Drawdown Indicators

	SIFI	TMB	Difference
Max Drawdown Largest peak-to-trough decline	-14.68%	-0.10%	-14.58%
Max Drawdown (1Y) Largest decline over 1 year	-2.71%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-3.46%	—	—
Current Drawdown Current decline from peak	-0.06%	-0.00%	-0.06%
Average Drawdown Average peak-to-trough decline	-4.83%	-0.02%	-4.81%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.66%	—	—

Volatility

Volatility by Period

	SIFI	TMB	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.03%	—	—
Volatility (6M) Calculated over the trailing 6-month period	2.48%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	3.39%	1.66%	+1.73%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.94%	1.66%	+3.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.94%	1.66%	+3.28%

SIFI vs. TMB - Expense Ratio Comparison

SIFI has a 0.50% expense ratio, which is lower than TMB's 0.55% expense ratio.

Dividends

SIFI vs. TMB - Dividend Comparison

SIFI's dividend yield for the trailing twelve months is around 6.44%, more than TMB's 0.36% yield.

Position	TTM	2025	2024	2023	2022	2021
SIFI Harbor Scientific Alpha Income ETF	6.44%	6.57%	5.87%	5.71%	3.88%	0.86%
TMB Thornburg Multi Sector Bond ETF	0.36%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both SIFI and TMB in my portfolio?

SIFI and TMB have a correlation of 0.30, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, SIFI or TMB?

On fees, SIFI is cheaper at 0.50% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, SIFI or TMB?

SIFI is cheaper with a 0.50% expense ratio, compared with 0.55% for TMB.

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

SIFI has the higher dividend yield at 6.44%, compared with 0.36% for TMB.

What is the main difference between SIFI and TMB?

They also come from different issuers: Harbor and Thornburg. Their fees differ too: 0.50% for SIFI and 0.55% for TMB.