BKCI vs. BUFI

Last updated Jun 4, 2026

BKCI (BNY Mellon Concentrated International ETF) and BUFI (AB International Buffer ETF) are both exchange-traded funds - BKCI is a Foreign Large Cap Equities fund actively managed by BNY Mellon, while BUFI is a Defined Outcome fund actively managed by AllianceBernstein. Both are actively managed. Over the past year, BKCI returned 6.77% vs 12.80% for BUFI. Their correlation of 0.88 suggests significant overlap in exposure. BKCI charges 0.80%/yr vs 0.69%/yr for BUFI.

Performance

BKCI vs. BUFI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BNY Mellon Concentrated International ETF (BKCI) and AB International Buffer ETF (BUFI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BKCI achieves a 3.52% return, which is significantly lower than BUFI's 4.92% return.

BKCI

• 1D: -0.32%
• 1M: 3.93%
• YTD: 3.52%
• 6M: 4.73%
• 1Y: 6.77%
• 3Y*: 4.55%
• 5Y*: —
• 10Y*: —

BUFI

• 1D: -0.31%
• 1M: 1.83%
• YTD: 4.92%
• 6M: 6.32%
• 1Y: 12.80%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

BKCI vs. BUFI - Yearly Performance Comparison

	2026 (YTD)	2025	2024
BKCI BNY Mellon Concentrated International ETF	3.52%	9.94%	-4.15%
BUFI AB International Buffer ETF	4.92%	16.50%	-1.31%

Correlation

The correlation between BKCI and BUFI is 0.87, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.87
Correlation (All Time) Calculated using the full available price history since Dec 11, 2024	0.88

The correlation between BKCI and BUFI has been stable across timeframes, ranging from 0.87 to 0.88 - a consistent structural relationship.

Return for Risk

BKCI vs. BUFI — Risk / Return Rank

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

BKCI

BKCI Risk / Return Rank: 16
BKCI Sharpe Ratio Rank: 16
BKCI Sortino Ratio Rank: 16
BKCI Omega Ratio Rank: 15
BKCI Calmar Ratio Rank: 17
BKCI Martin Ratio Rank: 18

BUFI

BUFI Risk / Return Rank: 47
BUFI Sharpe Ratio Rank: 44
BUFI Sortino Ratio Rank: 46
BUFI Omega Ratio Rank: 47
BUFI Calmar Ratio Rank: 46
BUFI Martin Ratio Rank: 53

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.

BKCI vs. BUFI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BNY Mellon Concentrated International ETF (BKCI) and AB International Buffer ETF (BUFI). 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.

	BKCI	BUFI	Difference
Sharpe ratio: Return per unit of total volatility	0.48	1.53	-1.05
Sortino ratio: Return per unit of downside risk	0.76	2.25	-1.49
Omega ratio: Gain probability vs. loss probability	1.09	1.30	-0.21
Calmar ratio: Return relative to maximum drawdown	0.60	2.26	-1.66
Martin ratio: Return relative to average drawdown	1.89	8.98	-7.10
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BKCI vs. BUFI - Sharpe Ratio Comparison

The current BKCI Sharpe Ratio is 0.48, which is lower than the BUFI Sharpe Ratio of 1.53. The chart below compares the historical Sharpe Ratios of BKCI and BUFI, 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

	BKCI	BUFI	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.48	1.53	-1.05
Sharpe Ratio (All Time) Calculated using the full available price history	0.09	1.50	-1.41

Drawdowns

BKCI vs. BUFI - Drawdown Comparison

The maximum BKCI drawdown since its inception was -31.03%, which is greater than BUFI's maximum drawdown of -7.43%. Use the drawdown chart below to compare losses from any high point for BKCI and BUFI.

Drawdown Indicators

	BKCI	BUFI	Difference
Max Drawdown Largest peak-to-trough decline	-31.03%	-7.43%	-23.60%
Max Drawdown (1Y) Largest decline over 1 year	-11.30%	-5.69%	-5.61%
Max Drawdown (3Y) Largest decline over 3 years	-20.02%	—	—
Current Drawdown Current decline from peak	-1.06%	-0.32%	-0.74%
Average Drawdown Average peak-to-trough decline	-9.40%	-0.86%	-8.54%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.60%	1.43%	+2.17%

Volatility

BKCI vs. BUFI - Volatility Comparison

BNY Mellon Concentrated International ETF (BKCI) has a higher volatility of 3.62% compared to AB International Buffer ETF (BUFI) at 2.20%. This indicates that BKCI's price experiences larger fluctuations and is considered to be riskier than BUFI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BKCI	BUFI	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.62%	2.20%	+1.42%
Volatility (6M) Calculated over the trailing 6-month period	11.24%	7.05%	+4.19%
Volatility (1Y) Calculated over the trailing 1-year period	14.30%	8.43%	+5.87%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.61%	9.15%	+7.46%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.61%	9.15%	+7.46%

BKCI vs. BUFI - Expense Ratio Comparison

BKCI has a 0.80% expense ratio, which is higher than BUFI's 0.69% expense ratio.

Dividends

BKCI vs. BUFI - Dividend Comparison

BKCI's dividend yield for the trailing twelve months is around 1.34%, while BUFI has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022
BKCI BNY Mellon Concentrated International ETF	1.34%	1.39%	0.78%	0.73%	0.46%
BUFI AB International Buffer ETF	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both BKCI and BUFI in my portfolio?

BKCI and BUFI have a correlation of 0.87, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BKCI or BUFI?

BKCI has higher volatility (3.62%) compared to BUFI (2.20%). In terms of maximum drawdown, BKCI dropped -31.03% vs BUFI's -7.43%.

Which ETF is better, BKCI or BUFI?

On 1-year performance, BUFI leads with 12.80% vs 6.77% for BKCI. On fees, BUFI is cheaper at 0.69% per year. On volatility, BUFI has been the lower-risk option at 2.20%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, BKCI or BUFI?

Over the 1-year period, BUFI has performed better with a 12.80% return vs 6.77%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, BKCI or BUFI?

BUFI is cheaper with a 0.69% expense ratio, compared with 0.80% for BKCI.

Which ETF pays a higher dividend yield, BKCI or BUFI?

BKCI has the higher dividend yield at 1.34%, compared with 0.00% for BUFI.

What is the main difference between BKCI and BUFI?

BKCI is categorized as Foreign Large Cap Equities, while BUFI is Defined Outcome. They also come from different issuers: BNY Mellon and AllianceBernstein. Their fees differ too: 0.80% for BKCI and 0.69% for BUFI.

Which has better risk-adjusted returns?

BUFI currently has the higher Sharpe Ratio (1.53 vs 0.48), 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.