SIFI vs. EPAI

Last updated Jun 3, 2026

SIFI (Harbor Scientific Alpha Income ETF) and EPAI (Harbor AI Inflection Strategy ETF) are both exchange-traded funds - SIFI is a Multisector Bonds fund actively managed by Harbor, while EPAI is a Technology Equities fund actively managed by Harbor. Both are actively managed. At a 0.43 correlation, their price movements are largely independent. SIFI charges 0.50%/yr vs 0.88%/yr for EPAI.

Performance

SIFI vs. EPAI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Harbor Scientific Alpha Income ETF (SIFI) and Harbor AI Inflection Strategy ETF (EPAI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, SIFI achieves a 1.27% return, which is significantly lower than EPAI's 46.44% return.

SIFI

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

EPAI

• 1D: 3.66%
• 1M: 8.13%
• YTD: 46.44%
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

SIFI vs. EPAI - Yearly Performance Comparison

	2026 (YTD)	2025
SIFI Harbor Scientific Alpha Income ETF	1.27%	0.25%
EPAI Harbor AI Inflection Strategy ETF	46.44%	0.86%

Correlation

The correlation between SIFI and EPAI is 0.43, 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 Dec 19, 2025	0.43

Return for Risk

SIFI vs. EPAI — 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. EPAI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Harbor Scientific Alpha Income ETF (SIFI) and Harbor AI Inflection Strategy ETF (EPAI). 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	EPAI	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	EPAI	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	4.59	-4.12

Drawdowns

SIFI vs. EPAI - Drawdown Comparison

The maximum SIFI drawdown since its inception was -14.68%, which is greater than EPAI's maximum drawdown of -12.31%. Use the drawdown chart below to compare losses from any high point for SIFI and EPAI.

Drawdown Indicators

	SIFI	EPAI	Difference
Max Drawdown Largest peak-to-trough decline	-14.68%	-12.31%	-2.37%
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%	-2.69%	-2.14%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.66%	—	—

Volatility

Volatility by Period

	SIFI	EPAI	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%	30.74%	-27.35%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.94%	30.74%	-25.80%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.94%	30.74%	-25.80%

SIFI vs. EPAI - Expense Ratio Comparison

SIFI has a 0.50% expense ratio, which is lower than EPAI's 0.88% expense ratio.

Dividends

SIFI vs. EPAI - Dividend Comparison

SIFI's dividend yield for the trailing twelve months is around 6.44%, while EPAI has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021
EPAI Harbor AI Inflection Strategy ETF	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
SIFI Harbor Scientific Alpha Income ETF	6.44%	6.57%	5.87%	5.71%	3.88%	0.86%

Frequently Asked Questions

Can I hold both SIFI and EPAI in my portfolio?

SIFI and EPAI have a correlation of 0.43, 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 EPAI?

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 EPAI?

SIFI is cheaper with a 0.50% expense ratio, compared with 0.88% for EPAI.

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

SIFI has the higher dividend yield at 6.44%, compared with 0.00% for EPAI.

What is the main difference between SIFI and EPAI?

SIFI is categorized as Multisector Bonds, while EPAI is Technology Equities. Their fees differ too: 0.50% for SIFI and 0.88% for EPAI.