IDUB vs. BFLX

Last updated Jul 14, 2026

IDUB (Aptus International Enhanced Yield ETF) and BFLX (iShares Flexible Equity Active ETF) are both Long-Short funds. Both are actively managed. Their correlation of 0.84 suggests significant overlap in exposure. IDUB charges 0.45%/yr vs 0.40%/yr for BFLX.

Performance

IDUB vs. BFLX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Aptus International Enhanced Yield ETF (IDUB) and iShares Flexible Equity Active ETF (BFLX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

IDUB

• 1D: -1.71%
• 1M: -1.16%
• 6M: 9.74%
• YTD: 14.07%
• 1Y: 27.23%
• 3Y*: 15.95%
• 5Y*: —
• 10Y*: —

BFLX

• 1D: -1.12%
• 1M: -0.58%
• 6M: —
• YTD: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

IDUB vs. BFLX - Yearly Performance Comparison

	2026 (YTD)
IDUB Aptus International Enhanced Yield ETF	2.22%
BFLX iShares Flexible Equity Active ETF	0.28%

Correlation

The correlation between IDUB and BFLX is 0.84, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (All Time) Calculated using the full available price history since May 20, 2026	0.84

IDUB vs. BFLX - Sectors Allocation Comparison

Sectors	IDUB	BFLX
Financial Services	22.3%	15.4%
Technology	18.1%	30.3%
Industrials	16.1%	12.3%
Consumer Cyclical	8.4%	11.3%
Basic Materials	7.6%	3.4%
Healthcare	7.1%	7.4%
Energy	5.2%	2.9%
Consumer Defensive	5.0%	4.6%
Communication Services	4.4%	7.4%
Utilities	3.2%	3.2%
Real Estate	2.6%	1.8%

Return for Risk

IDUB vs. BFLX — Risk / Return Rank

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

IDUB

IDUB Risk / Return Rank: 63
IDUB Sharpe Ratio Rank: 63
IDUB Sortino Ratio Rank: 62
IDUB Omega Ratio Rank: 64
IDUB Calmar Ratio Rank: 61
IDUB Martin Ratio Rank: 65

BFLX

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

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. BFLX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Aptus International Enhanced Yield ETF (IDUB) and iShares Flexible Equity Active ETF (BFLX). 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	BFLX	Difference
Sharpe ratio: Return per unit of total volatility	1.65	—	—
Sortino ratio: Return per unit of downside risk	2.31	—	—
Omega ratio: Gain probability vs. loss probability	1.31	—	—
Calmar ratio: Return relative to maximum drawdown	2.39	—	—
Martin ratio: Return relative to average drawdown	9.23	—	—

Drawdowns

IDUB vs. BFLX - Drawdown Comparison

The maximum IDUB drawdown since its inception was -29.20%, which is greater than BFLX's maximum drawdown of -3.85%. Use the drawdown chart below to compare losses from any high point for IDUB and BFLX.

Drawdown Indicators

	IDUB	BFLX	Difference
Max Drawdown Largest peak-to-trough decline	-29.20%	-3.85%	-25.35%
Max Drawdown (1Y) Largest decline over 1 year	-11.46%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-12.88%	—	—
Current Drawdown Current decline from peak	-2.92%	-2.47%	-0.45%
Average Drawdown Average peak-to-trough decline	-10.97%	-1.32%	-9.65%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.96%	—	—

Volatility

Volatility by Period

	IDUB	BFLX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.53%	—	—
Volatility (6M) Calculated over the trailing 6-month period	14.37%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	16.60%	14.58%	+2.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.80%	14.58%	+0.22%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.80%	14.58%	+0.22%

IDUB vs. BFLX - Expense Ratio Comparison

IDUB has a 0.45% expense ratio, which is higher than BFLX's 0.40% expense ratio.

Dividends

IDUB vs. BFLX - Dividend Comparison

IDUB's dividend yield for the trailing twelve months is around 4.64%, while BFLX has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021
BFLX iShares Flexible Equity Active ETF	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
IDUB Aptus International Enhanced Yield ETF	4.64%	4.90%	5.64%	3.71%	2.62%	1.38%

Frequently Asked Questions

Can I hold both IDUB and BFLX in my portfolio?

IDUB and BFLX have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, IDUB or BFLX?

On fees, BFLX is cheaper at 0.40% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, IDUB or BFLX?

BFLX is cheaper with a 0.40% expense ratio, compared with 0.45% for IDUB.

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

IDUB has the higher dividend yield at 4.64%, compared with 0.00% for BFLX.

What is the main difference between IDUB and BFLX?

They also come from different issuers: Aptus and iShares. Their fees differ too: 0.45% for IDUB and 0.40% for BFLX.