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EWY vs. TER
Performance
Return for Risk
Drawdowns
Volatility
Dividends

EWY vs. TER

Last updated Jun 16, 2026

EWY (iShares MSCI South Korea ETF) is Asia Pacific Equities fund tracking the MSCI Korea Index, while TER (Teradyne, Inc.) is a stock. Over the past 10 years, EWY returned 17.58%/yr vs 37.39%/yr for TER. At a 0.48 correlation, their price movements are largely independent.

Performance

EWY vs. TER - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares MSCI South Korea ETF (EWY) and Teradyne, Inc. (TER). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, EWY achieves a 117.50% return, which is significantly lower than TER's 123.58% return. Over the past 10 years, EWY has underperformed TER with an annualized return of 17.58%, while TER has yielded a comparatively higher 37.39% annualized return.

EWY

1D
7.09%
1M
18.22%
YTD
117.50%
6M
133.15%
1Y
225.50%
3Y*
50.62%
5Y*
20.64%
10Y*
17.58%

TER

1D
7.24%
1M
28.03%
YTD
123.58%
6M
122.27%
1Y
421.81%
3Y*
57.92%
5Y*
28.01%
10Y*
37.39%
*Multi-year figures are annualized to reflect compound growth (CAGR)

EWY vs. TER - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
EWY
iShares MSCI South Korea ETF		117.50%95.33%-20.48%19.05%-26.59%-7.58%39.43%7.97%-20.37%44.97%
TER
Teradyne, Inc.		123.58%54.39%16.51%24.78%-46.35%36.81%76.73%118.93%-24.37%66.16%

Correlation

The correlation between EWY and TER is 0.56, 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

0.56

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

0.52

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

0.54

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

0.52

Correlation (All Time)
Calculated using the full available price history since May 12, 2000

0.48

The correlation between EWY and TER has been stable across timeframes, ranging from 0.48 to 0.56 - a consistent structural relationship.

Compare stocks, funds, or ETFs

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

iShares MSCI South Korea ETF

Teradyne, Inc.

Often compared with EWY:
EWY vs. FLKREWY vs. SPYEWY vs. EWJEWY vs. KORUEWY vs. QQQEWY vs. EWTEWY vs. EWH
Often compared with TER:
TER vs. AEHRTER vs. SNPSTER vs. AMATTER vs. VGTTER vs. BWXTTER vs. PLABTER vs. CDNS

Return for Risk

EWY vs. TER — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
EWY
EWY Risk / Return Rank: 9696
Overall Rank
EWY Sharpe Ratio Rank: 9898
Sharpe Ratio Rank
EWY Sortino Ratio Rank: 9494
Sortino Ratio Rank
EWY Omega Ratio Rank: 9494
Omega Ratio Rank
EWY Calmar Ratio Rank: 9797
Calmar Ratio Rank
EWY Martin Ratio Rank: 9696
Martin Ratio Rank
TER
TER Risk / Return Rank: 9999
Overall Rank
TER Sharpe Ratio Rank: 9999
Sharpe Ratio Rank
TER Sortino Ratio Rank: 9898
Sortino Ratio Rank
TER Omega Ratio Rank: 9898
Omega Ratio Rank
TER Calmar Ratio Rank: 9999
Calmar Ratio Rank
TER Martin Ratio Rank: 9999
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.

EWY vs. TER - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares MSCI South Korea ETF (EWY) and Teradyne, Inc. (TER). 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.

EWYTERDifference
Sharpe ratioReturn per unit of total volatility
4.84
6.31

-1.47

Sortino ratioReturn per unit of downside risk
4.39
4.78

-0.39

Omega ratioGain probability vs. loss probability

1.64

1.69

-0.05

Calmar ratioReturn relative to maximum drawdown

9.84

15.91

-6.07

Martin ratioReturn relative to average drawdown

34.39

56.72

-22.33

EWY vs. TER - Sharpe Ratio Comparison

The current EWY Sharpe Ratio is 4.84, which is comparable to the TER Sharpe Ratio of 6.31. The chart below compares the historical Sharpe Ratios of EWY and TER, 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

EWY vs. TER - Drawdown Comparison

The maximum EWY drawdown since its inception was -74.14%, smaller than the maximum TER drawdown of -97.30%. Use the drawdown chart below to compare losses from any high point for EWY and TER.

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Drawdown Indicators

EWYTERDifference

Max Drawdown

Largest peak-to-trough decline

-74.14%

-97.30%

+23.16%

Max Drawdown (1Y)

Largest decline over 1 year

-23.08%

-26.73%

+3.65%

Max Drawdown (3Y)

Largest decline over 3 years

-27.36%

-58.18%

+30.82%

Max Drawdown (5Y)

Largest decline over 5 years

-48.55%

-59.12%

+10.57%

Max Drawdown (10Y)

Largest decline over 10 years

-49.73%

-59.12%

+9.39%

Current Drawdown

Current decline from peak

-2.42%

0.00%

-2.42%

Average Drawdown

Average peak-to-trough decline

-20.11%

-58.66%

+38.55%

Ulcer Index

Depth and duration of drawdowns from previous peaks

6.59%

7.48%

-0.89%

Volatility

EWY vs. TER - Volatility Comparison

iShares MSCI South Korea ETF (EWY) and Teradyne, Inc. (TER) have volatilities of 26.48% and 25.68%, 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

EWYTERDifference

Volatility (1M)

Calculated over the trailing 1-month period

26.48%

25.68%

+0.80%

Volatility (6M)

Calculated over the trailing 6-month period

43.04%

53.49%

-10.45%

Volatility (1Y)

Calculated over the trailing 1-year period

47.01%

67.51%

-20.50%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

30.33%

50.31%

-19.98%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

28.15%

45.38%

-17.23%

Dividends

EWY vs. TER - Dividend Comparison

EWY's dividend yield for the trailing twelve months is around 0.96%, more than TER's 0.12% yield.

PositionTTM20252024202320222021202020192018201720162015
EWY
iShares MSCI South Korea ETF		0.96%2.10%2.55%2.52%1.23%2.16%0.73%2.10%1.34%2.90%1.21%2.42%
TER
Teradyne, Inc.		0.12%0.25%0.38%0.41%0.50%0.24%0.33%0.53%1.15%0.67%0.94%1.16%

Frequently Asked Questions

EWY and TER have a correlation of 0.56, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

EWY has higher volatility (26.48%) compared to TER (25.68%). In terms of maximum drawdown, EWY dropped -74.14% vs TER's -97.30%.

TER currently has the higher Sharpe Ratio (6.31 vs 4.84), 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.

Portfolio Optimizer

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