CYSE.L vs. WDEF.L

Last updated Jun 5, 2026

CYSE.L (WisdomTree Cybersecurity UCITS ETF USD Acc) and WDEF.L (WisdomTree Europe Defence UCITS ETF - EUR Acc EUR) are both exchange-traded funds - CYSE.L is a Technology Equities fund tracking the MSCI World/Information Tech NR USD, while WDEF.L is a Aerospace & Defense fund tracking the WisdomTree Europe Defence UCITS Index. Both are passively managed. Over the past 5 years, CYSE.L returned 10.59%/yr vs 5.29%/yr for WDEF.L. At a 0.30 correlation, their price movements are largely independent. CYSE.L charges 0.45%/yr vs 0.40%/yr for WDEF.L.

Performance

CYSE.L vs. WDEF.L - Performance Comparison

The chart below illustrates the hypothetical performance of a £10,000 investment in WisdomTree Cybersecurity UCITS ETF USD Acc (CYSE.L) and WisdomTree Europe Defence UCITS ETF - EUR Acc EUR (WDEF.L). The values are adjusted to include any dividend payments, if applicable.

Different Trading Currencies

CYSE.L is traded in GBp, while WDEF.L is traded in EUR. To make them comparable, the WDEF.L values have been converted to GBp using the latest available exchange rates.

Returns By Period

In the year-to-date period, CYSE.L achieves a 24.45% return, which is significantly higher than WDEF.L's -0.02% return.

CYSE.L

• 1D: -1.44%
• 1M: 26.86%
• YTD: 24.45%
• 6M: 17.83%
• 1Y: 12.00%
• 3Y*: 18.44%
• 5Y*: 10.59%
• 10Y*: —

WDEF.L

• 1D: 0.00%
• 1M: -4.77%
• YTD: -0.02%
• 6M: 2.85%
• 1Y: -2.04%
• 3Y*: 9.31%
• 5Y*: 5.29%
• 10Y*: —

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

CYSE.L vs. WDEF.L - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
CYSE.L WisdomTree Cybersecurity UCITS ETF USD Acc	24.45%	-8.72%	13.36%	60.49%	-36.28%	11.39%
WDEF.L WisdomTree Europe Defence UCITS ETF - EUR Acc EUR	1.27%	32.72%	-6.71%	18.06%	-15.48%	17.86%

Correlation

The correlation between CYSE.L and WDEF.L is 0.16, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.16
Correlation (3Y) Calculated over the trailing 3-year period	0.27
Correlation (5Y) Calculated over the trailing 5-year period	0.29
Correlation (All Time) Calculated using the full available price history since Jan 29, 2021	0.30

The correlation between CYSE.L and WDEF.L shifts across timeframes, from 0.16 (1 year) to 0.30 (all time), reflecting how their relationship changes across market environments.

CYSE.L vs. WDEF.L - Sectors Allocation Comparison

Sectors	CYSE.L	WDEF.L
Technology	100.0%	3.2%
Basic Materials	-	-
Communication Services	-	0.4%
Consumer Cyclical	-	-
Consumer Defensive	-	-
Energy	-	-
Financial Services	-	-
Healthcare	-	0.1%
Industrials	-	89.7%
Real Estate	-	-
Utilities	-	-

Return for Risk

CYSE.L vs. WDEF.L — Risk / Return Rank

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

CYSE.L

CYSE.L Risk / Return Rank: 15
CYSE.L Sharpe Ratio Rank: 15
CYSE.L Sortino Ratio Rank: 16
CYSE.L Omega Ratio Rank: 17
CYSE.L Calmar Ratio Rank: 14
CYSE.L Martin Ratio Rank: 13

WDEF.L

WDEF.L Risk / Return Rank: 11
WDEF.L Sharpe Ratio Rank: 9
WDEF.L Sortino Ratio Rank: 13
WDEF.L Omega Ratio Rank: 16
WDEF.L Calmar Ratio Rank: 8
WDEF.L Martin Ratio Rank: 8

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.

CYSE.L vs. WDEF.L - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for WisdomTree Cybersecurity UCITS ETF USD Acc (CYSE.L) and WisdomTree Europe Defence UCITS ETF - EUR Acc EUR (WDEF.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.

	CYSE.L	WDEF.L	Difference
Sharpe ratio: Return per unit of total volatility	0.37	-0.03	+0.40
Sortino ratio: Return per unit of downside risk	0.73	0.54	+0.18
Omega ratio: Gain probability vs. loss probability	1.10	1.09	0.00
Calmar ratio: Return relative to maximum drawdown	0.38	-0.08	+0.46
Martin ratio: Return relative to average drawdown	0.87	-0.22	+1.09
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CYSE.L vs. WDEF.L - Sharpe Ratio Comparison

The current CYSE.L Sharpe Ratio is 0.37, which is higher than the WDEF.L Sharpe Ratio of -0.03. The chart below compares the historical Sharpe Ratios of CYSE.L and WDEF.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.

Sharpe Ratios by Period

	CYSE.L	WDEF.L	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.37	-0.03	+0.40
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.34	0.16	+0.18
Sharpe Ratio (All Time) Calculated using the full available price history	0.24	0.33	-0.09

Drawdowns

CYSE.L vs. WDEF.L - Drawdown Comparison

The maximum CYSE.L drawdown since its inception was -46.58%, which is greater than WDEF.L's maximum drawdown of -27.89%. Use the drawdown chart below to compare losses from any high point for CYSE.L and WDEF.L.

Drawdown Indicators

	CYSE.L	WDEF.L	Difference
Max Drawdown Largest peak-to-trough decline	-46.58%	-27.89%	-18.69%
Max Drawdown (1Y) Largest decline over 1 year	-31.22%	-26.45%	-4.77%
Max Drawdown (3Y) Largest decline over 3 years	-35.88%	-26.45%	-9.43%
Max Drawdown (5Y) Largest decline over 5 years	-46.58%	-27.89%	-18.69%
Current Drawdown Current decline from peak	-4.84%	-15.86%	+11.02%
Average Drawdown Average peak-to-trough decline	-19.16%	-7.82%	-11.34%
Ulcer Index Depth and duration of drawdowns from previous peaks	13.71%	9.25%	+4.46%

Volatility

CYSE.L vs. WDEF.L - Volatility Comparison

WisdomTree Cybersecurity UCITS ETF USD Acc (CYSE.L) has a higher volatility of 13.86% compared to WisdomTree Europe Defence UCITS ETF - EUR Acc EUR (WDEF.L) at 10.30%. This indicates that CYSE.L's price experiences larger fluctuations and is considered to be riskier than WDEF.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CYSE.L	WDEF.L	Difference
Volatility (1M) Calculated over the trailing 1-month period	13.86%	10.30%	+3.56%
Volatility (6M) Calculated over the trailing 6-month period	28.40%	64.56%	-36.16%
Volatility (1Y) Calculated over the trailing 1-year period	32.03%	73.80%	-41.77%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	31.30%	42.77%	-11.47%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	31.34%	41.41%	-10.07%

CYSE.L vs. WDEF.L - Expense Ratio Comparison

CYSE.L has a 0.45% expense ratio, which is higher than WDEF.L's 0.40% expense ratio.

Dividends

CYSE.L vs. WDEF.L - Dividend Comparison

Neither CYSE.L nor WDEF.L has paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022
CYSE.L WisdomTree Cybersecurity UCITS ETF USD Acc	0.00%	0.00%	0.00%	0.00%	0.24%
WDEF.L WisdomTree Europe Defence UCITS ETF - EUR Acc EUR	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both CYSE.L and WDEF.L in my portfolio?

CYSE.L and WDEF.L have a correlation of 0.16, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, CYSE.L or WDEF.L?

On fees, WDEF.L 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, CYSE.L or WDEF.L?

WDEF.L is cheaper with a 0.40% expense ratio, compared with 0.45% for CYSE.L.

What is the main difference between CYSE.L and WDEF.L?

CYSE.L is categorized as Technology Equities, while WDEF.L is Aerospace & Defense. CYSE.L tracks MSCI World/Information Tech NR USD, while WDEF.L tracks WisdomTree Europe Defence UCITS Index. Their fees differ too: 0.45% for CYSE.L and 0.40% for WDEF.L.