FLXR vs. SIFI

Last updated Jun 4, 2026

FLXR (TCW Flexible Income ETF) and SIFI (Harbor Scientific Alpha Income ETF) are both Multisector Bonds funds. Both are actively managed. Over the past year, FLXR returned 5.89% vs 7.30% for SIFI. A 0.70 correlation means they provide meaningful diversification when combined. FLXR charges 0.40%/yr vs 0.50%/yr for SIFI.

Performance

FLXR vs. SIFI - Performance Comparison

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

Returns By Period

The year-to-date returns for both investments are quite close, with FLXR having a 1.09% return and SIFI slightly higher at 1.12%.

FLXR

• 1D: -0.18%
• 1M: 0.36%
• YTD: 1.09%
• 6M: 1.43%
• 1Y: 5.89%
• 3Y*: —
• 5Y*: —
• 10Y*: —

SIFI

• 1D: -0.14%
• 1M: 0.38%
• YTD: 1.12%
• 6M: 1.44%
• 1Y: 7.30%
• 3Y*: 7.13%
• 5Y*: —
• 10Y*: —

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

FLXR vs. SIFI - Yearly Performance Comparison

	2026 (YTD)	2025	2024
FLXR TCW Flexible Income ETF	1.09%	8.37%	4.77%
SIFI Harbor Scientific Alpha Income ETF	1.12%	8.83%	3.26%

Correlation

The correlation between FLXR and SIFI is 0.71, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.71
Correlation (All Time) Calculated using the full available price history since Jun 25, 2024	0.70

The correlation between FLXR and SIFI has been stable across timeframes, ranging from 0.70 to 0.71 - a consistent structural relationship.

FLXR vs. SIFI - Sectors Allocation Comparison

Sectors	FLXR	SIFI
Healthcare	62.4%	3.9%
Real Estate	37.6%	4.8%
Basic Materials	-	0.7%
Communication Services	-	3.0%
Consumer Cyclical	-	11.8%
Consumer Defensive	-	2.9%
Energy	-	7.9%
Financial Services	-	4.4%
Industrials	-	16.2%
Technology	-	15.7%
Utilities	-	1.9%

Return for Risk

FLXR vs. SIFI — Risk / Return Rank

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

FLXR

FLXR Risk / Return Rank: 82
FLXR Sharpe Ratio Rank: 79
FLXR Sortino Ratio Rank: 86
FLXR Omega Ratio Rank: 83
FLXR Calmar Ratio Rank: 78
FLXR Martin Ratio Rank: 84

SIFI

SIFI Risk / Return Rank: 65
SIFI Sharpe Ratio Rank: 66
SIFI Sortino Ratio Rank: 73
SIFI Omega Ratio Rank: 70
SIFI Calmar Ratio Rank: 55
SIFI Martin Ratio Rank: 62

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.

FLXR vs. SIFI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for TCW Flexible Income ETF (FLXR) and Harbor Scientific Alpha Income ETF (SIFI). 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.

	FLXR	SIFI	Difference
Sharpe ratio: Return per unit of total volatility	2.61	2.16	+0.45
Sortino ratio: Return per unit of downside risk	3.94	3.31	+0.64
Omega ratio: Gain probability vs. loss probability	1.51	1.42	+0.09
Calmar ratio: Return relative to maximum drawdown	4.04	2.70	+1.34
Martin ratio: Return relative to average drawdown	17.36	11.05	+6.31
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FLXR vs. SIFI - Sharpe Ratio Comparison

The current FLXR Sharpe Ratio is 2.61, which is comparable to the SIFI Sharpe Ratio of 2.16. The chart below compares the historical Sharpe Ratios of FLXR and SIFI, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	FLXR	SIFI	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.61	2.16	+0.45
Sharpe Ratio (All Time) Calculated using the full available price history	2.65	0.47	+2.18

Drawdowns

FLXR vs. SIFI - Drawdown Comparison

The maximum FLXR drawdown since its inception was -1.94%, smaller than the maximum SIFI drawdown of -14.68%. Use the drawdown chart below to compare losses from any high point for FLXR and SIFI.

Drawdown Indicators

	FLXR	SIFI	Difference
Max Drawdown Largest peak-to-trough decline	-1.94%	-14.68%	+12.74%
Max Drawdown (1Y) Largest decline over 1 year	-1.46%	-2.71%	+1.25%
Max Drawdown (3Y) Largest decline over 3 years	—	-3.46%	—
Current Drawdown Current decline from peak	-0.23%	-0.20%	-0.03%
Average Drawdown Average peak-to-trough decline	-0.36%	-4.82%	+4.46%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.34%	0.66%	-0.32%

Volatility

FLXR vs. SIFI - Volatility Comparison

The current volatility for TCW Flexible Income ETF (FLXR) is 0.76%, while Harbor Scientific Alpha Income ETF (SIFI) has a volatility of 1.02%. This indicates that FLXR experiences smaller price fluctuations and is considered to be less risky than SIFI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FLXR	SIFI	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.76%	1.02%	-0.26%
Volatility (6M) Calculated over the trailing 6-month period	1.65%	2.47%	-0.82%
Volatility (1Y) Calculated over the trailing 1-year period	2.26%	3.39%	-1.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.79%	4.93%	-2.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.79%	4.93%	-2.14%

FLXR vs. SIFI - Expense Ratio Comparison

FLXR has a 0.40% expense ratio, which is lower than SIFI's 0.50% expense ratio.

Dividends

FLXR vs. SIFI - Dividend Comparison

FLXR's dividend yield for the trailing twelve months is around 5.82%, less than SIFI's 6.45% yield.

Position	TTM	2025	2024	2023	2022	2021
FLXR TCW Flexible Income ETF	5.82%	5.66%	3.44%	0.00%	0.00%	0.00%
SIFI Harbor Scientific Alpha Income ETF	6.45%	6.57%	5.87%	5.71%	3.88%	0.86%

Frequently Asked Questions

Can I hold both FLXR and SIFI in my portfolio?

FLXR and SIFI have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FLXR or SIFI?

SIFI has higher volatility (1.02%) compared to FLXR (0.76%). In terms of maximum drawdown, FLXR dropped -1.94% vs SIFI's -14.68%.

Which ETF is better, FLXR or SIFI?

On 1-year performance, SIFI leads with 7.30% vs 5.89% for FLXR. On fees, FLXR is cheaper at 0.40% per year. On volatility, FLXR has been the lower-risk option at 0.76%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, FLXR or SIFI?

Over the 1-year period, SIFI has performed better with a 7.30% return vs 5.89%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, FLXR or SIFI?

FLXR is cheaper with a 0.40% expense ratio, compared with 0.50% for SIFI.

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

SIFI has the higher dividend yield at 6.45%, compared with 5.82% for FLXR.

What is the main difference between FLXR and SIFI?

They also come from different issuers: TCW and Harbor. Their fees differ too: 0.40% for FLXR and 0.50% for SIFI.

Which has better risk-adjusted returns?

FLXR currently has the higher Sharpe Ratio (2.61 vs 2.16), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.