IDUB vs. FFLS

Last updated Jul 17, 2026

IDUB (Aptus International Enhanced Yield ETF) and FFLS (The Future Fund Long/Short ETF) are both Long-Short funds. Both are actively managed. Over the past 3 years, IDUB returned 16.01%/yr vs 7.69%/yr for FFLS. A 0.51 correlation means they provide meaningful diversification when combined. IDUB charges 0.45%/yr vs 1.75%/yr for FFLS.

Performance

IDUB vs. FFLS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Aptus International Enhanced Yield ETF (IDUB) and The Future Fund Long/Short ETF (FFLS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IDUB achieves a 14.33% return, which is significantly higher than FFLS's -2.16% return.

IDUB

• 1D: -0.84%
• 1M: -1.98%
• 6M: 9.81%
• YTD: 14.33%
• 1Y: 27.57%
• 3Y*: 16.01%
• 5Y*: —
• 10Y*: —

FFLS

• 1D: -1.45%
• 1M: 0.15%
• 6M: -4.12%
• YTD: -2.16%
• 1Y: -3.85%
• 3Y*: 7.69%
• 5Y*: —
• 10Y*: —

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

IDUB vs. FFLS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
IDUB Aptus International Enhanced Yield ETF	14.33%	27.53%	6.12%	2.90%
FFLS The Future Fund Long/Short ETF	-2.16%	7.49%	17.71%	0.79%

Correlation

The correlation between IDUB and FFLS is 0.49, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.49
Correlation (3Y) Calculated over the trailing 3-year period	0.51
Correlation (All Time) Calculated using the full available price history since Jun 21, 2023	0.51

The correlation between IDUB and FFLS has been stable across timeframes, ranging from 0.49 to 0.51 - a consistent structural relationship.

IDUB vs. FFLS - Sectors Allocation Comparison

Sectors	IDUB	FFLS
Financial Services	22.3%	-7.9%
Technology	18.1%	13.8%
Industrials	16.1%	14.5%
Consumer Cyclical	8.4%	2.3%
Basic Materials	7.6%	-
Healthcare	7.1%	14.2%
Energy	5.2%	4.8%
Consumer Defensive	5.0%	1.7%
Communication Services	4.4%	5.6%
Utilities	3.2%	-
Real Estate	2.6%	2.5%

Return for Risk

IDUB vs. FFLS — Risk / Return Rank

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

IDUB

IDUB Risk / Return Rank: 64
IDUB Sharpe Ratio Rank: 64
IDUB Sortino Ratio Rank: 63
IDUB Omega Ratio Rank: 65
IDUB Calmar Ratio Rank: 61
IDUB Martin Ratio Rank: 67

FFLS

FFLS Risk / Return Rank: 6
FFLS Sharpe Ratio Rank: 6
FFLS Sortino Ratio Rank: 6
FFLS Omega Ratio Rank: 5
FFLS Calmar Ratio Rank: 6
FFLS Martin Ratio Rank: 6

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.

IDUB vs. FFLS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Aptus International Enhanced Yield ETF (IDUB) and The Future Fund Long/Short ETF (FFLS). 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.

	IDUB	FFLS	Difference
Sharpe ratio: Return per unit of total volatility	1.69	-0.39	+2.08
Sortino ratio: Return per unit of downside risk	2.36	-0.48	+2.84
Omega ratio: Gain probability vs. loss probability	1.31	0.94	+0.37
Calmar ratio: Return relative to maximum drawdown	2.42	-0.35	+2.77
Martin ratio: Return relative to average drawdown	9.37	-0.71	+10.08

IDUB vs. FFLS - Sharpe Ratio Comparison

The current IDUB Sharpe Ratio is 1.69, which is higher than the FFLS Sharpe Ratio of -0.39. The chart below compares the historical Sharpe Ratios of IDUB and FFLS, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

IDUB vs. FFLS - Drawdown Comparison

The maximum IDUB drawdown since its inception was -29.20%, which is greater than FFLS's maximum drawdown of -11.05%. Use the drawdown chart below to compare losses from any high point for IDUB and FFLS.

Drawdown Indicators

	IDUB	FFLS	Difference
Max Drawdown Largest peak-to-trough decline	-29.20%	-11.05%	-18.15%
Max Drawdown (1Y) Largest decline over 1 year	-11.46%	-11.05%	-0.41%
Max Drawdown (3Y) Largest decline over 3 years	-12.88%	-11.05%	-1.83%
Current Drawdown Current decline from peak	-2.71%	-6.77%	+4.06%
Average Drawdown Average peak-to-trough decline	-10.94%	-3.21%	-7.73%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.95%	5.45%	-2.50%

Volatility

IDUB vs. FFLS - Volatility Comparison

Aptus International Enhanced Yield ETF (IDUB) has a higher volatility of 4.71% compared to The Future Fund Long/Short ETF (FFLS) at 3.75%. This indicates that IDUB's price experiences larger fluctuations and is considered to be riskier than FFLS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IDUB	FFLS	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.71%	3.75%	+0.96%
Volatility (6M) Calculated over the trailing 6-month period	14.41%	8.24%	+6.17%
Volatility (1Y) Calculated over the trailing 1-year period	16.42%	9.93%	+6.49%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.80%	11.40%	+3.40%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.80%	11.40%	+3.40%

IDUB vs. FFLS - Expense Ratio Comparison

IDUB has a 0.45% expense ratio, which is lower than FFLS's 1.75% expense ratio.

Dividends

IDUB vs. FFLS - Dividend Comparison

IDUB's dividend yield for the trailing twelve months is around 4.63%, less than FFLS's 6.72% yield.

Position	TTM	2025	2024	2023	2022	2021
FFLS The Future Fund Long/Short ETF	6.72%	6.58%	3.34%	0.00%	0.00%	0.00%
IDUB Aptus International Enhanced Yield ETF	4.63%	4.90%	5.64%	3.71%	2.62%	1.38%

Frequently Asked Questions

Can I hold both IDUB and FFLS in my portfolio?

IDUB and FFLS have a correlation of 0.49, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IDUB or FFLS?

IDUB has higher volatility (4.71%) compared to FFLS (3.75%). In terms of maximum drawdown, IDUB dropped -29.20% vs FFLS's -11.05%.

Which ETF is better, IDUB or FFLS?

On 3-year performance, IDUB leads with 16.01% vs 7.69% for FFLS. On fees, IDUB is cheaper at 0.45% per year. On volatility, FFLS has been the lower-risk option at 3.75%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, IDUB or FFLS?

Over the 3-year period, IDUB has performed better with a 16.01% return vs 7.69%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, IDUB or FFLS?

IDUB is cheaper with a 0.45% expense ratio, compared with 1.75% for FFLS.

Which ETF pays a higher dividend yield, IDUB or FFLS?

FFLS has the higher dividend yield at 6.72%, compared with 4.63% for IDUB.

What is the main difference between IDUB and FFLS?

They also come from different issuers: Aptus and The Future Fund. Their fees differ too: 0.45% for IDUB and 1.75% for FFLS.

Which has better risk-adjusted returns?

IDUB currently has the higher Sharpe Ratio (1.69 vs -0.39), 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.