WDC vs. EWY
WDC (Western Digital Corporation) is a stock, while EWY (iShares MSCI South Korea ETF) is Asia Pacific Equities fund tracking the MSCI Korea Index. Over the past 10 years, WDC returned 33.87%/yr vs 16.84%/yr for EWY. At a 0.41 correlation, their price movements are largely independent.
Performance
WDC vs. EWY - Performance Comparison
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Returns By Period
In the year-to-date period, WDC achieves a 227.01% return, which is significantly higher than EWY's 103.10% return. Over the past 10 years, WDC has outperformed EWY with an annualized return of 33.87%, while EWY has yielded a comparatively lower 16.84% annualized return.
WDC
- 1D
- 6.35%
- 1M
- 15.11%
- YTD
- 227.01%
- 6M
- 219.46%
- 1Y
- 913.38%
- 3Y*
- 164.18%
- 5Y*
- 58.50%
- 10Y*
- 33.87%
EWY
- 1D
- -0.75%
- 1M
- 3.64%
- YTD
- 103.10%
- 6M
- 117.85%
- 1Y
- 203.95%
- 3Y*
- 46.46%
- 5Y*
- 18.80%
- 10Y*
- 16.84%
WDC vs. EWY - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
WDC Western Digital Corporation | 227.01% | 283.68% | 13.86% | 65.99% | -51.62% | 17.73% | -10.89% | 77.14% | -51.90% | 19.83% |
EWY iShares MSCI South Korea ETF | 103.10% | 95.33% | -20.48% | 19.05% | -26.59% | -7.58% | 39.43% | 7.97% | -20.37% | 44.97% |
Correlation
The correlation between WDC and EWY is 0.53, 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 | 0.53 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.49 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.52 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.47 |
Correlation (All Time) Calculated using the full available price history since May 12, 2000 | 0.41 |
The correlation between WDC and EWY shifts across timeframes, from 0.41 (all time) to 0.53 (1 year), reflecting how their relationship changes across market environments.
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Return for Risk
WDC vs. EWY — Risk / Return Rank
WDC
EWY
WDC vs. EWY - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Western Digital Corporation (WDC) and iShares MSCI South Korea ETF (EWY). 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.
| WDC | EWY | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +9.78 | ||
| Sortino ratioReturn per unit of downside risk | +2.81 | ||
| Omega ratioGain probability vs. loss probability | 1.95 | 1.59 | +0.36 |
| Calmar ratioReturn relative to maximum drawdown | 44.74 | 8.65 | +36.10 |
| Martin ratioReturn relative to average drawdown | 151.81 | 30.24 | +121.58 |
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Drawdowns
WDC vs. EWY - Drawdown Comparison
The maximum WDC drawdown since its inception was -96.20%, which is greater than EWY's maximum drawdown of -74.14%. Use the drawdown chart below to compare losses from any high point for WDC and EWY.
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Drawdown Indicators
| WDC | EWY | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -96.20% | -74.14% | -22.06% |
Max Drawdown (1Y)Largest decline over 1 year | -20.59% | -23.08% | +2.49% |
Max Drawdown (3Y)Largest decline over 3 years | -49.65% | -27.36% | -22.29% |
Max Drawdown (5Y)Largest decline over 5 years | -59.68% | -48.55% | -11.13% |
Max Drawdown (10Y)Largest decline over 10 years | -70.49% | -49.73% | -20.76% |
Current DrawdownCurrent decline from peak | -5.22% | -8.88% | +3.66% |
Average DrawdownAverage peak-to-trough decline | -52.07% | -20.11% | -31.96% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 6.06% | 6.59% | -0.53% |
Volatility
WDC vs. EWY - Volatility Comparison
The current volatility for Western Digital Corporation (WDC) is 21.76%, while iShares MSCI South Korea ETF (EWY) has a volatility of 25.64%. This indicates that WDC experiences smaller price fluctuations and is considered to be less risky than EWY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| WDC | EWY | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 21.76% | 25.64% | -3.88% |
Volatility (6M)Calculated over the trailing 6-month period | 53.55% | 42.65% | +10.90% |
Volatility (1Y)Calculated over the trailing 1-year period | 65.47% | 46.51% | +18.96% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 48.86% | 30.15% | +18.71% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 48.62% | 28.06% | +20.56% |
Dividends
WDC vs. EWY - Dividend Comparison
WDC's dividend yield for the trailing twelve months is around 0.09%, less than EWY's 1.03% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
EWY iShares MSCI South Korea ETF | 1.03% | 2.10% | 2.55% | 2.52% | 1.23% | 2.16% | 0.73% | 2.10% | 1.34% | 2.90% | 1.21% | 2.42% |
WDC Western Digital Corporation | 0.09% | 0.19% | 0.00% | 0.00% | 0.00% | 0.00% | 1.81% | 2.36% | 5.41% | 2.51% | 2.94% | 3.33% |
Frequently Asked Questions
WDC and EWY have a correlation of 0.53, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
EWY has higher volatility (25.64%) compared to WDC (21.76%). In terms of maximum drawdown, WDC dropped -96.20% vs EWY's -74.14%.
WDC currently has the higher Sharpe Ratio (14.07 vs 4.29), 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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