IYZ vs. GREK
IYZ (iShares U.S. Telecommunications ETF) and GREK (Global X MSCI Greece ETF) are both exchange-traded funds - IYZ is a Communications Equities fund tracking the Dow Jones U.S. Select Telecommunications Index, while GREK is a Emerging Markets Equities fund tracking the MSCI All Greece Select 25-50. Both are passively managed. Over the past 10 years, IYZ returned 4.05%/yr vs 16.17%/yr for GREK. At a 0.37 correlation, their price movements are largely independent. IYZ charges 0.42%/yr vs 0.58%/yr for GREK.
Performance
IYZ vs. GREK - Performance Comparison
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Returns By Period
In the year-to-date period, IYZ achieves a 18.92% return, which is significantly higher than GREK's 14.15% return. Over the past 10 years, IYZ has underperformed GREK with an annualized return of 4.05%, while GREK has yielded a comparatively higher 16.17% annualized return.
IYZ
- 1D
- -0.22%
- 1M
- -3.80%
- 6M
- 19.38%
- YTD
- 18.92%
- 1Y
- 36.49%
- 3Y*
- 24.26%
- 5Y*
- 6.03%
- 10Y*
- 4.05%
- ALL TIME*
- 1.23%
GREK
- 1D
- 0.11%
- 1M
- -2.53%
- 6M
- 7.43%
- YTD
- 14.15%
- 1Y
- 25.52%
- 3Y*
- 27.97%
- 5Y*
- 27.03%
- 10Y*
- 16.17%
- ALL TIME*
- 5.76%
IYZ vs. GREK - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
IYZ iShares U.S. Telecommunications ETF | 18.92% | 29.28% | 20.53% | 3.90% | -30.29% | 11.69% | 4.13% | 16.14% | -8.59% | -11.86% |
GREK Global X MSCI Greece ETF | 14.15% | 76.11% | 9.53% | 42.72% | 3.64% | 6.14% | -13.89% | 50.20% | -31.25% | 34.80% |
Correlation
The correlation between IYZ and GREK is 0.28, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.28 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.29 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.39 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.39 |
Correlation (All Time) Calculated using the full available price history since Dec 8, 2011 | 0.37 |
The correlation between IYZ and GREK shifts across timeframes, from 0.28 (1 year) to 0.39 (10 years), reflecting how their relationship changes across market environments.
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Return for Risk
IYZ vs. GREK — Risk / Return Rank
IYZ
GREK
IYZ vs. GREK - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares U.S. Telecommunications ETF (IYZ) and Global X MSCI Greece ETF (GREK). 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.
| IYZ | GREK | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.83 | ||
| Sortino ratioReturn per unit of downside risk | +0.92 | ||
| Omega ratioGain probability vs. loss probability | 1.33 | 1.20 | +0.13 |
| Calmar ratioReturn relative to maximum drawdown | 2.91 | 1.20 | +1.71 |
| Martin ratioReturn relative to average drawdown | 10.01 | 3.69 | +6.32 |
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Drawdowns
IYZ vs. GREK - Drawdown Comparison
The maximum IYZ drawdown since its inception was -77.11%, roughly equal to the maximum GREK drawdown of -79.50%. Use the drawdown chart below to compare losses from any high point for IYZ and GREK.
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Drawdown Indicators
| IYZ | GREK | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -77.11% | -79.50% | +2.39% |
Max Drawdown (1Y)Largest decline over 1 year | -12.60% | -21.32% | +8.72% |
Max Drawdown (3Y)Largest decline over 3 years | -13.85% | -22.63% | +8.78% |
Max Drawdown (5Y)Largest decline over 5 years | -39.74% | -30.46% | -9.28% |
Max Drawdown (10Y)Largest decline over 10 years | -39.74% | -57.04% | +17.30% |
Current DrawdownCurrent decline from peak | -12.60% | -4.93% | -7.67% |
Average DrawdownAverage peak-to-trough decline | -39.99% | -44.97% | +4.98% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.66% | 6.93% | -3.27% |
Volatility
IYZ vs. GREK - Volatility Comparison
iShares U.S. Telecommunications ETF (IYZ) has a higher volatility of 6.35% compared to Global X MSCI Greece ETF (GREK) at 5.98%. This indicates that IYZ's price experiences larger fluctuations and is considered to be riskier than GREK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IYZ | GREK | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.35% | 5.98% | +0.37% |
Volatility (6M)Calculated over the trailing 6-month period | 16.50% | 21.10% | -4.60% |
Volatility (1Y)Calculated over the trailing 1-year period | 19.53% | 24.36% | -4.83% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 19.07% | 24.39% | -5.32% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 19.31% | 28.85% | -9.54% |
IYZ vs. GREK - Expense Ratio Comparison
IYZ has a 0.42% expense ratio, which is lower than GREK's 0.58% expense ratio.
Dividends
IYZ vs. GREK - Dividend Comparison
IYZ's dividend yield for the trailing twelve months is around 1.76%, less than GREK's 2.61% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
GREK Global X MSCI Greece ETF | 2.61% | 3.46% | 4.63% | 2.61% | 2.82% | 2.16% | 2.62% | 2.25% | 2.41% | 2.13% | 1.95% | 1.52% |
IYZ iShares U.S. Telecommunications ETF | 1.76% | 2.04% | 1.94% | 2.27% | 2.55% | 2.51% | 2.60% | 2.36% | 2.15% | 3.54% | 2.27% | 1.98% |
Frequently Asked Questions
IYZ and GREK have a correlation of 0.28, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
IYZ has higher volatility (6.35%) compared to GREK (5.98%). In terms of maximum drawdown, IYZ dropped -77.11% vs GREK's -79.50%.
On 10-year performance, GREK leads with 16.17% vs 4.05% for IYZ. On fees, IYZ is cheaper at 0.42% per year. On volatility, GREK has been the lower-risk option at 5.98%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 10-year period, GREK has performed better with a 16.17% return vs 4.05%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
IYZ is cheaper with a 0.42% expense ratio, compared with 0.58% for GREK.
GREK has the higher dividend yield at 2.61%, compared with 1.76% for IYZ.
IYZ is categorized as Communications Equities, while GREK is Emerging Markets Equities. IYZ tracks Dow Jones U.S. Select Telecommunications Index, while GREK tracks MSCI All Greece Select 25-50. They also come from different issuers: iShares and Global X. Their fees differ too: 0.42% for IYZ and 0.58% for GREK.
IYZ currently has the higher Sharpe Ratio (1.88 vs 1.05), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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