CUS1.L vs. CUSS.L
CUS1.L (iShares MSCI USA Small Cap ESG Enhanced UCITS ETF (Acc)) and CUSS.L (iShares MSCI USA Small Cap CTB Enhanced ESG UCITS ETF USD (Acc)) are both Small Cap Blend Equities funds from iShares - CUS1.L tracks the Russell 2000 TR USD while CUSS.L tracks the MSCI USA Small Cap ESG Enhanced CTB Index. Both are passively managed. Over the past 10 years, CUS1.L returned 10.62%/yr vs 10.58%/yr for CUSS.L. Their correlation of 0.94 suggests significant overlap in exposure. Both charge a 0.43% expense ratio.
Performance
CUS1.L vs. CUSS.L - Performance Comparison
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Different Trading Currencies
CUS1.L is traded in GBp, while CUSS.L is traded in USD. To make them comparable, the CUSS.L values have been converted to GBp using the latest available exchange rates.
Returns By Period
The year-to-date returns for both stocks are quite close, with CUS1.L having a 16.61% return and CUSS.L slightly lower at 16.43%. Both investments have delivered pretty close results over the past 10 years, with CUS1.L having a 10.62% annualized return and CUSS.L not far behind at 10.58%.
CUS1.L
- 1D
- -0.83%
- 1M
- -1.64%
- 6M
- 11.36%
- YTD
- 16.61%
- 1Y
- 28.75%
- 3Y*
- 13.43%
- 5Y*
- 8.04%
- 10Y*
- 10.62%
CUSS.L
- 1D
- 0.00%
- 1M
- -2.10%
- 6M
- 11.12%
- YTD
- 16.43%
- 1Y
- 28.47%
- 3Y*
- 12.93%
- 5Y*
- 7.96%
- 10Y*
- 10.58%
CUS1.L vs. CUSS.L - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
CUS1.L iShares MSCI USA Small Cap ESG Enhanced UCITS ETF (Acc) | 16.61% | 2.68% | 11.54% | 11.30% | -7.26% | 19.95% | 14.64% | 22.34% | -6.43% | 6.42% |
CUSS.L iShares MSCI USA Small Cap CTB Enhanced ESG UCITS ETF USD (Acc) | 16.43% | 2.30% | 11.72% | 11.84% | -7.30% | 19.67% | 15.07% | 21.58% | -5.62% | 6.06% |
Correlation
The correlation between CUS1.L and CUSS.L is 0.95 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.95 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.95 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.95 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.95 |
Correlation (All Time) Calculated using the full available price history since Sep 15, 2010 | 0.94 |
The correlation between CUS1.L and CUSS.L has been stable across timeframes, ranging from 0.94 to 0.95 - a consistent structural relationship.
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Return for Risk
CUS1.L vs. CUSS.L — Risk / Return Rank
CUS1.L
CUSS.L
CUS1.L vs. CUSS.L - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares MSCI USA Small Cap ESG Enhanced UCITS ETF (Acc) (CUS1.L) and iShares MSCI USA Small Cap CTB Enhanced ESG UCITS ETF USD (Acc) (CUSS.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.
| CUS1.L | CUSS.L | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.06 | ||
| Sortino ratioReturn per unit of downside risk | -0.14 | ||
| Omega ratioGain probability vs. loss probability | 1.32 | 1.33 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | 4.45 | 4.52 | -0.07 |
| Martin ratioReturn relative to average drawdown | 13.18 | 13.69 | -0.52 |
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Drawdowns
CUS1.L vs. CUSS.L - Drawdown Comparison
The maximum CUS1.L drawdown since its inception was -35.26%, roughly equal to the maximum CUSS.L drawdown of -35.69%. Use the drawdown chart below to compare losses from any high point for CUS1.L and CUSS.L.
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Drawdown Indicators
| CUS1.L | CUSS.L | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -35.26% | -35.69% | +0.43% |
Max Drawdown (1Y)Largest decline over 1 year | -6.44% | -6.87% | +0.43% |
Max Drawdown (3Y)Largest decline over 3 years | -28.89% | -29.20% | +0.31% |
Max Drawdown (5Y)Largest decline over 5 years | -28.89% | -29.20% | +0.31% |
Max Drawdown (10Y)Largest decline over 10 years | -35.26% | -35.69% | +0.43% |
Current DrawdownCurrent decline from peak | -4.61% | -4.86% | +0.25% |
Average DrawdownAverage peak-to-trough decline | -6.33% | -6.22% | -0.11% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.18% | 2.27% | -0.09% |
Volatility
CUS1.L vs. CUSS.L - Volatility Comparison
iShares MSCI USA Small Cap ESG Enhanced UCITS ETF (Acc) (CUS1.L) and iShares MSCI USA Small Cap CTB Enhanced ESG UCITS ETF USD (Acc) (CUSS.L) have volatilities of 4.97% and 4.87%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| CUS1.L | CUSS.L | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.97% | 4.87% | +0.10% |
Volatility (6M)Calculated over the trailing 6-month period | 11.07% | 12.04% | -0.97% |
Volatility (1Y)Calculated over the trailing 1-year period | 15.36% | 16.29% | -0.93% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 22.87% | 20.11% | +2.76% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.50% | 20.42% | +1.08% |
CUS1.L vs. CUSS.L - Expense Ratio Comparison
Both CUS1.L and CUSS.L have an expense ratio of 0.43%.
Dividends
CUS1.L vs. CUSS.L - Dividend Comparison
Neither CUS1.L nor CUSS.L has paid dividends to shareholders.
Frequently Asked Questions
With a correlation of 0.95, CUS1.L and CUSS.L move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
Both ETFs have the same 0.43% expense ratio. The better choice depends on whether you care most about return, fees, risk, or income.
CUS1.L and CUSS.L have the same expense ratio: 0.43% per year.
CUS1.L tracks Russell 2000 TR USD, while CUSS.L tracks MSCI USA Small Cap ESG Enhanced CTB Index.
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