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IDUS.L vs. BYBU.L
Performance
Return for Risk
Drawdowns
Volatility
Dividends

IDUS.L vs. BYBU.L

Last updated Jun 5, 2026

IDUS.L (iShares Core S&P 500 UCITS ETF USD Distributing) and BYBU.L (Amundi S&P 500 Buyback ETF-C USD) are both S&P 500 funds - IDUS.L tracks the S&P 500 while BYBU.L tracks the S&P 500 Buyback NTR. Both are passively managed. Over the past 5 years, IDUS.L returned 13.71%/yr vs 10.16%/yr for BYBU.L. At a 0.40 correlation, their price movements are largely independent. IDUS.L charges 0.07%/yr vs 0.15%/yr for BYBU.L.

Performance

IDUS.L vs. BYBU.L - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Core S&P 500 UCITS ETF USD Distributing (IDUS.L) and Amundi S&P 500 Buyback ETF-C USD (BYBU.L). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, IDUS.L achieves a 10.32% return, which is significantly higher than BYBU.L's 8.18% return.

IDUS.L

1D
0.00%
1M
4.47%
YTD
10.32%
6M
11.13%
1Y
27.84%
3Y*
22.16%
5Y*
13.71%
10Y*
15.19%

BYBU.L

1D
0.96%
1M
4.76%
YTD
8.18%
6M
9.93%
1Y
22.65%
3Y*
18.64%
5Y*
10.16%
10Y*
—
*Multi-year figures are annualized to reflect compound growth (CAGR)

IDUS.L vs. BYBU.L - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
IDUS.L
iShares Core S&P 500 UCITS ETF USD Distributing		10.32%17.36%25.31%26.75%-18.68%29.32%17.63%30.58%-5.51%9.53%
BYBU.L
Amundi S&P 500 Buyback ETF-C USD		8.18%17.38%14.97%15.90%-12.83%37.69%3.27%31.62%-6.60%8.16%

Correlation

The correlation between IDUS.L and BYBU.L is 0.66, 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

0.66

Correlation (3Y)
Calculated over the trailing 3-year period

0.49

Correlation (5Y)
Calculated over the trailing 5-year period

0.50

Correlation (All Time)
Calculated using the full available price history since Jul 28, 2017

0.40

Over the past year, IDUS.L and BYBU.L have become more correlated (0.66) than their long-term average of 0.40, meaning their price movements have been converging.

IDUS.L vs. BYBU.L - Sectors Allocation Comparison

Sectors
IDUS.L
BYBU.L

Technology

38.3%
22.4%

Financial Services

11.2%
27.9%

Communication Services

10.6%
4.6%

Consumer Cyclical

9.7%
15.8%

Healthcare

8.3%
7.5%

Industrials

7.6%
9.0%

Consumer Defensive

4.6%
3.7%

Energy

3.3%
5.2%

Utilities

2.6%
0.9%

Real Estate

1.8%
3.0%

Basic Materials

1.7%
3.1%

Technology

IDUS.L
38.3%
BYBU.L
22.4%

Financial Services

IDUS.L
11.2%
BYBU.L
27.9%

Communication Services

IDUS.L
10.6%
BYBU.L
4.6%

Consumer Cyclical

IDUS.L
9.7%
BYBU.L
15.8%

Healthcare

IDUS.L
8.3%
BYBU.L
7.5%

Industrials

IDUS.L
7.6%
BYBU.L
9.0%

Consumer Defensive

IDUS.L
4.6%
BYBU.L
3.7%

Energy

IDUS.L
3.3%
BYBU.L
5.2%

Utilities

IDUS.L
2.6%
BYBU.L
0.9%

Real Estate

IDUS.L
1.8%
BYBU.L
3.0%

Basic Materials

IDUS.L
1.7%
BYBU.L
3.1%

Compare stocks, funds, or ETFs

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iShares Core S&P 500 UCITS ETF USD Distributing

Amundi S&P 500 Buyback ETF-C USD

Often compared with IDUS.L:
IDUS.L vs. IUMS.LIDUS.L vs. IMSU.LIDUS.L vs. VUSD.LIDUS.L vs. CSPX.LIDUS.L vs. SPYL.LIDUS.L vs. CSPX.ASIDUS.L vs. IUUS.L
Often compared with BYBU.L:
BYBU.L vs. BUYB.LBYBU.L vs. QQQBYBU.L vs. VOOBYBU.L vs. IMSU.LBYBU.L vs. SPYL.LBYBU.L vs. VFMOBYBU.L vs. VMO.TO

Return for Risk

IDUS.L vs. BYBU.L — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
IDUS.L
IDUS.L Risk / Return Rank: 7575
Overall Rank
IDUS.L Sharpe Ratio Rank: 7474
Sharpe Ratio Rank
IDUS.L Sortino Ratio Rank: 7979
Sortino Ratio Rank
IDUS.L Omega Ratio Rank: 7474
Omega Ratio Rank
IDUS.L Calmar Ratio Rank: 6969
Calmar Ratio Rank
IDUS.L Martin Ratio Rank: 7777
Martin Ratio Rank
BYBU.L
BYBU.L Risk / Return Rank: 6565
Overall Rank
BYBU.L Sharpe Ratio Rank: 5757
Sharpe Ratio Rank
BYBU.L Sortino Ratio Rank: 6262
Sortino Ratio Rank
BYBU.L Omega Ratio Rank: 5454
Omega Ratio Rank
BYBU.L Calmar Ratio Rank: 8383
Calmar Ratio Rank
BYBU.L Martin Ratio Rank: 6767
Martin Ratio Rank
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.

IDUS.L vs. BYBU.L - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Core S&P 500 UCITS ETF USD Distributing (IDUS.L) and Amundi S&P 500 Buyback ETF-C USD (BYBU.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.

IDUS.LBYBU.LDifference
Sharpe ratioReturn per unit of total volatility
2.37
1.90

+0.47

Sortino ratioReturn per unit of downside risk
3.47
2.87

+0.60

Omega ratioGain probability vs. loss probability

1.43

1.33

+0.10

Calmar ratioReturn relative to maximum drawdown

3.39

4.34

-0.95

Martin ratioReturn relative to average drawdown

14.66

12.04

+2.62

Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IDUS.L vs. BYBU.L - Sharpe Ratio Comparison

The current IDUS.L Sharpe Ratio is 2.37, which is comparable to the BYBU.L Sharpe Ratio of 1.90. The chart below compares the historical Sharpe Ratios of IDUS.L and BYBU.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.

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Sharpe Ratios by Period

IDUS.LBYBU.LDifference

Sharpe Ratio (1Y)

Calculated over the trailing 1-year period

2.37

1.90

+0.47

Sharpe Ratio (5Y)

Calculated over the trailing 5-year period

0.86

0.83

+0.03

Sharpe Ratio (10Y)

Calculated over the trailing 10-year period

0.93

—

—

Sharpe Ratio (All Time)

Calculated using the full available price history

0.61

1.14

-0.53

Drawdowns

IDUS.L vs. BYBU.L - Drawdown Comparison

The maximum IDUS.L drawdown since its inception was -55.48%, which is greater than BYBU.L's maximum drawdown of -28.64%. Use the drawdown chart below to compare losses from any high point for IDUS.L and BYBU.L.

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Drawdown Indicators

IDUS.LBYBU.LDifference

Max Drawdown

Largest peak-to-trough decline

-55.48%

-28.64%

-26.84%

Max Drawdown (1Y)

Largest decline over 1 year

-8.17%

-5.19%

-2.98%

Max Drawdown (3Y)

Largest decline over 3 years

-18.48%

-19.21%

+0.73%

Max Drawdown (5Y)

Largest decline over 5 years

-24.38%

-22.11%

-2.27%

Max Drawdown (10Y)

Largest decline over 10 years

-33.83%

—

—

Current Drawdown

Current decline from peak

-0.57%

0.00%

-0.57%

Average Drawdown

Average peak-to-trough decline

-8.11%

-4.86%

-3.25%

Ulcer Index

Depth and duration of drawdowns from previous peaks

1.90%

1.88%

+0.02%

Volatility

IDUS.L vs. BYBU.L - Volatility Comparison

The current volatility for iShares Core S&P 500 UCITS ETF USD Distributing (IDUS.L) is 3.20%, while Amundi S&P 500 Buyback ETF-C USD (BYBU.L) has a volatility of 3.55%. This indicates that IDUS.L experiences smaller price fluctuations and is considered to be less risky than BYBU.L based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

IDUS.LBYBU.LDifference

Volatility (1M)

Calculated over the trailing 1-month period

3.20%

3.55%

-0.35%

Volatility (6M)

Calculated over the trailing 6-month period

8.57%

8.14%

+0.43%

Volatility (1Y)

Calculated over the trailing 1-year period

11.69%

11.86%

-0.17%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

16.00%

21.25%

-5.25%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

16.32%

27.74%

-11.42%

IDUS.L vs. BYBU.L - Expense Ratio Comparison

IDUS.L has a 0.07% expense ratio, which is lower than BYBU.L's 0.15% 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

IDUS.L vs. BYBU.L - Dividend Comparison

IDUS.L's dividend yield for the trailing twelve months is around 0.86%, while BYBU.L has not paid dividends to shareholders.

PositionTTM20252024202320222021202020192018201720162015
BYBU.L
Amundi S&P 500 Buyback ETF-C USD		0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%
IDUS.L
iShares Core S&P 500 UCITS ETF USD Distributing		0.86%0.92%1.02%1.22%1.44%1.03%1.32%1.49%1.74%1.44%1.42%1.55%

Frequently Asked Questions

IDUS.L and BYBU.L have a correlation of 0.66, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

On fees, IDUS.L is cheaper at 0.07% per year. The better choice depends on whether you care most about return, fees, risk, or income.

IDUS.L is cheaper with a 0.07% expense ratio, compared with 0.15% for BYBU.L.

IDUS.L tracks S&P 500, while BYBU.L tracks S&P 500 Buyback NTR. They also come from different issuers: iShares and Amundi. Their fees differ too: 0.07% for IDUS.L and 0.15% for BYBU.L.

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