BBUS.L vs. FLXK.L

Last updated Jul 18, 2026

BBUS.L (BetaBuilders US Equity UCITS USD Acc) and FLXK.L (Franklin FTSE Korea UCITS ETF USD (Acc)) are both exchange-traded funds - BBUS.L is a Large Cap Blend Equities fund tracking the Russell 1000 TR USD, while FLXK.L is a South Korea Equities fund tracking the FTSE Korea 30/18 Capped Index (Net Return). Both are passively managed. Over the past 5 years, BBUS.L returned 12.30%/yr vs 15.20%/yr for FLXK.L. A 0.59 correlation means they provide meaningful diversification when combined. BBUS.L charges 0.04%/yr vs 0.09%/yr for FLXK.L.

Performance

BBUS.L vs. FLXK.L - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BetaBuilders US Equity UCITS USD Acc (BBUS.L) and Franklin FTSE Korea UCITS ETF USD (Acc) (FLXK.L). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BBUS.L achieves a 8.71% return, which is significantly lower than FLXK.L's 71.91% return.

BBUS.L

• 1D: -1.14%
• 1M: -0.42%
• 6M: 7.80%
• YTD: 8.71%
• 1Y: 19.34%
• 3Y*: 19.36%
• 5Y*: 12.30%
• 10Y*: —

FLXK.L

• 1D: -2.04%
• 1M: -22.39%
• 6M: 50.11%
• YTD: 71.91%
• 1Y: 137.12%
• 3Y*: 38.47%
• 5Y*: 15.20%
• 10Y*: —

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

BBUS.L vs. FLXK.L - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
BBUS.L BetaBuilders US Equity UCITS USD Acc	8.71%	17.54%	24.98%	27.64%	-19.96%	27.64%	20.13%	17.75%
FLXK.L Franklin FTSE Korea UCITS ETF USD (Acc)	71.91%	94.79%	-21.63%	20.77%	-28.01%	-6.85%	47.31%	13.27%

Correlation

The correlation between BBUS.L and FLXK.L is 0.57, 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	0.57
Correlation (3Y) Calculated over the trailing 3-year period	0.58
Correlation (5Y) Calculated over the trailing 5-year period	0.59
Correlation (All Time) Calculated using the full available price history since Jun 4, 2019	0.59

The correlation between BBUS.L and FLXK.L has been stable across timeframes, ranging from 0.57 to 0.59 - a consistent structural relationship.

Return for Risk

BBUS.L vs. FLXK.L — Risk / Return Rank

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

BBUS.L

BBUS.L Risk / Return Rank: 63
BBUS.L Sharpe Ratio Rank: 62
BBUS.L Sortino Ratio Rank: 66
BBUS.L Omega Ratio Rank: 61
BBUS.L Calmar Ratio Rank: 58
BBUS.L Martin Ratio Rank: 67

FLXK.L

FLXK.L Risk / Return Rank: 92
FLXK.L Sharpe Ratio Rank: 96
FLXK.L Sortino Ratio Rank: 89
FLXK.L Omega Ratio Rank: 91
FLXK.L Calmar Ratio Rank: 94
FLXK.L Martin Ratio Rank: 93

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.

BBUS.L vs. FLXK.L - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BetaBuilders US Equity UCITS USD Acc (BBUS.L) and Franklin FTSE Korea UCITS ETF USD (Acc) (FLXK.L). 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.

	BBUS.L	FLXK.L	Difference
Sharpe ratio: Return per unit of total volatility	1.58	3.02	-1.44
Sortino ratio: Return per unit of downside risk	2.36	3.21	-0.84
Omega ratio: Gain probability vs. loss probability	1.29	1.45	-0.16
Calmar ratio: Return relative to maximum drawdown	2.23	5.32	-3.08
Martin ratio: Return relative to average drawdown	9.06	17.39	-8.33

BBUS.L vs. FLXK.L - Sharpe Ratio Comparison

The current BBUS.L Sharpe Ratio is 1.58, which is lower than the FLXK.L Sharpe Ratio of 3.02. The chart below compares the historical Sharpe Ratios of BBUS.L and FLXK.L, 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

BBUS.L vs. FLXK.L - Drawdown Comparison

The maximum BBUS.L drawdown since its inception was -34.26%, smaller than the maximum FLXK.L drawdown of -49.43%. Use the drawdown chart below to compare losses from any high point for BBUS.L and FLXK.L.

Drawdown Indicators

	BBUS.L	FLXK.L	Difference
Max Drawdown Largest peak-to-trough decline	-34.26%	-49.43%	+15.17%
Max Drawdown (1Y) Largest decline over 1 year	-8.62%	-25.64%	+17.02%
Max Drawdown (3Y) Largest decline over 3 years	-19.36%	-28.54%	+9.18%
Max Drawdown (5Y) Largest decline over 5 years	-25.33%	-47.00%	+21.67%
Current Drawdown Current decline from peak	-1.74%	-25.64%	+23.90%
Average Drawdown Average peak-to-trough decline	-5.29%	-20.23%	+14.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.13%	7.86%	-5.73%

Volatility

BBUS.L vs. FLXK.L - Volatility Comparison

The current volatility for BetaBuilders US Equity UCITS USD Acc (BBUS.L) is 3.17%, while Franklin FTSE Korea UCITS ETF USD (Acc) (FLXK.L) has a volatility of 18.88%. This indicates that BBUS.L experiences smaller price fluctuations and is considered to be less risky than FLXK.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BBUS.L	FLXK.L	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.17%	18.88%	-15.71%
Volatility (6M) Calculated over the trailing 6-month period	9.46%	41.57%	-32.11%
Volatility (1Y) Calculated over the trailing 1-year period	12.18%	45.12%	-32.94%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.20%	29.63%	-13.43%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.72%	29.60%	-11.88%

BBUS.L vs. FLXK.L - Expense Ratio Comparison

BBUS.L has a 0.04% expense ratio, which is lower than FLXK.L's 0.09% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

BBUS.L vs. FLXK.L - Dividend Comparison

Neither BBUS.L nor FLXK.L has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both BBUS.L and FLXK.L in my portfolio?

BBUS.L and FLXK.L have a correlation of 0.57, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, BBUS.L or FLXK.L?

On fees, BBUS.L is cheaper at 0.04% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, BBUS.L or FLXK.L?

BBUS.L is cheaper with a 0.04% expense ratio, compared with 0.09% for FLXK.L.

What is the main difference between BBUS.L and FLXK.L?

BBUS.L is categorized as Large Cap Blend Equities, while FLXK.L is South Korea Equities. BBUS.L tracks Russell 1000 TR USD, while FLXK.L tracks FTSE Korea 30/18 Capped Index (Net Return). They also come from different issuers: JPMorgan and Franklin. Their fees differ too: 0.04% for BBUS.L and 0.09% for FLXK.L.