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IH2O.L vs. COST
Performance
Return for Risk
Drawdowns
Volatility
Dividends

IH2O.L vs. COST

Last updated Jun 14, 2026

IH2O.L (iShares Global Water UCITS ETF) is Water Equities fund tracking the S&P Global Water TR, while COST (Costco Wholesale Corporation) is a stock. Over the past 10 years, IH2O.L returned 10.09%/yr vs 22.90%/yr for COST. At a 0.27 correlation, their price movements are largely independent.

Performance

IH2O.L vs. COST - Performance Comparison

The chart below illustrates the hypothetical performance of a £10,000 investment in iShares Global Water UCITS ETF (IH2O.L) and Costco Wholesale Corporation (COST). The values are adjusted to include any dividend payments, if applicable.

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Different Trading Currencies

IH2O.L is traded in GBp, while COST is traded in USD. To make them comparable, the COST values have been converted to GBp using the latest available exchange rates.

Returns By Period

In the year-to-date period, IH2O.L achieves a -1.27% return, which is significantly lower than COST's 14.82% return. Over the past 10 years, IH2O.L has underperformed COST with an annualized return of 10.09%, while COST has yielded a comparatively higher 22.90% annualized return.

IH2O.L

1D
1.15%
1M
0.53%
YTD
-1.27%
6M
-1.32%
1Y
4.55%
3Y*
5.78%
5Y*
5.22%
10Y*
10.09%

COST

1D
0.77%
1M
-6.92%
YTD
14.82%
6M
11.10%
1Y
1.01%
3Y*
22.60%
5Y*
23.38%
10Y*
22.90%
*Multi-year figures are annualized to reflect compound growth (CAGR)

IH2O.L vs. COST - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
IH2O.L
iShares Global Water UCITS ETF		-1.27%9.75%6.03%7.33%-11.32%32.25%11.29%29.42%-5.41%15.67%
COST
Costco Wholesale Corporation		14.82%-12.13%42.06%41.56%-9.42%53.26%28.77%40.16%17.16%11.79%

Correlation

The correlation between IH2O.L and COST is 0.20, which is low. Their price movements are largely independent, making them effective diversification partners.

Correlation
Correlation (1Y)
Calculated over the trailing 1-year period

0.20

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

0.15

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

0.21

Correlation (10Y)
Calculated over the trailing 10-year period

0.26

Correlation (All Time)
Calculated using the full available price history since Jul 12, 2007

0.27

The correlation between IH2O.L and COST shifts across timeframes, from 0.15 (3 years) to 0.27 (all time), reflecting how their relationship changes across market environments.

Compare stocks, funds, or ETFs

Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.

iShares Global Water UCITS ETF

Costco Wholesale Corporation

Often compared with IH2O.L:
IH2O.L vs. GLGG.LIH2O.L vs. FIWIH2O.L vs. PHOIH2O.L vs. IVVIH2O.L vs. IWQU.LIH2O.L vs. SLVR.DEIH2O.L vs. VT
Often compared with COST:
COST vs. WMTCOST vs. BRK-BCOST vs. BJCOST vs. TGTCOST vs. PGCOST vs. HDCOST vs. KO

Return for Risk

IH2O.L vs. COST — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
IH2O.L
IH2O.L Risk / Return Rank: 1414
Overall Rank
IH2O.L Sharpe Ratio Rank: 1515
Sharpe Ratio Rank
IH2O.L Sortino Ratio Rank: 1313
Sortino Ratio Rank
IH2O.L Omega Ratio Rank: 1414
Omega Ratio Rank
IH2O.L Calmar Ratio Rank: 1414
Calmar Ratio Rank
IH2O.L Martin Ratio Rank: 1515
Martin Ratio Rank
COST
COST Risk / Return Rank: 3737
Overall Rank
COST Sharpe Ratio Rank: 4040
Sharpe Ratio Rank
COST Sortino Ratio Rank: 3232
Sortino Ratio Rank
COST Omega Ratio Rank: 3232
Omega Ratio Rank
COST Calmar Ratio Rank: 4040
Calmar Ratio Rank
COST Martin Ratio Rank: 3939
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.

IH2O.L vs. COST - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Global Water UCITS ETF (IH2O.L) and Costco Wholesale Corporation (COST). 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.

IH2O.LCOSTDifference
Sharpe ratioReturn per unit of total volatility
0.33
0.00

+0.32

Sortino ratioReturn per unit of downside risk
0.52
0.14

+0.37

Omega ratioGain probability vs. loss probability

1.06

1.02

+0.05

Calmar ratioReturn relative to maximum drawdown

0.38

0.01

+0.38

Martin ratioReturn relative to average drawdown

0.97

0.01

+0.96

IH2O.L vs. COST - Sharpe Ratio Comparison

The current IH2O.L Sharpe Ratio is 0.33, which is higher than the COST Sharpe Ratio of 0.00. The chart below compares the historical Sharpe Ratios of IH2O.L and COST, 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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Drawdowns

IH2O.L vs. COST - Drawdown Comparison

The maximum IH2O.L drawdown since its inception was -67.32%, which is greater than COST's maximum drawdown of -30.97%. Use the drawdown chart below to compare losses from any high point for IH2O.L and COST.

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Drawdown Indicators

IH2O.LCOSTDifference

Max Drawdown

Largest peak-to-trough decline

-67.32%

-30.97%

-36.35%

Max Drawdown (1Y)

Largest decline over 1 year

-10.50%

-14.77%

+4.27%

Max Drawdown (3Y)

Largest decline over 3 years

-13.96%

-26.16%

+12.20%

Max Drawdown (5Y)

Largest decline over 5 years

-23.19%

-28.24%

+5.05%

Max Drawdown (10Y)

Largest decline over 10 years

-27.16%

-28.24%

+1.08%

Current Drawdown

Current decline from peak

-8.77%

-14.06%

+5.29%

Average Drawdown

Average peak-to-trough decline

-20.55%

-7.05%

-13.50%

Ulcer Index

Depth and duration of drawdowns from previous peaks

4.15%

6.18%

-2.03%

Volatility

IH2O.L vs. COST - Volatility Comparison

The current volatility for iShares Global Water UCITS ETF (IH2O.L) is 3.90%, while Costco Wholesale Corporation (COST) has a volatility of 7.81%. This indicates that IH2O.L experiences smaller price fluctuations and is considered to be less risky than COST based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

IH2O.LCOSTDifference

Volatility (1M)

Calculated over the trailing 1-month period

3.90%

7.81%

-3.91%

Volatility (6M)

Calculated over the trailing 6-month period

10.24%

15.48%

-5.24%

Volatility (1Y)

Calculated over the trailing 1-year period

12.36%

19.95%

-7.59%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

13.99%

22.84%

-8.85%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

14.93%

23.04%

-8.11%

Dividends

IH2O.L vs. COST - Dividend Comparison

IH2O.L's dividend yield for the trailing twelve months is around 1.43%, more than COST's 0.55% yield.

PositionTTM20252024202320222021202020192018201720162015
COST
Costco Wholesale Corporation		0.55%0.59%0.49%2.87%0.76%0.54%3.38%0.86%1.08%4.81%1.09%4.06%
IH2O.L
iShares Global Water UCITS ETF		1.43%1.35%1.05%1.21%1.11%1.67%1.00%1.43%1.77%1.52%1.62%1.61%

Frequently Asked Questions

IH2O.L and COST have a correlation of 0.20, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

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