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IDEV vs. VO
Performance
Return for Risk
Drawdowns
Volatility
Dividends

IDEV vs. VO

Last updated Jun 14, 2026

IDEV (iShares Core MSCI International Developed Markets ETF) and VO (Vanguard Mid-Cap ETF) are both exchange-traded funds - IDEV is a Foreign Large Cap Equities fund tracking the MSCI World ex USA Investable Market Index, while VO is a Mid Cap Blend Equities fund tracking the CRSP US Mid Cap Index. Both are passively managed. Over the past 5 years, IDEV returned 8.52%/yr vs 7.79%/yr for VO. A 0.78 correlation means they provide meaningful diversification when combined. IDEV charges 0.05%/yr vs 0.03%/yr for VO.

Performance

IDEV vs. VO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Core MSCI International Developed Markets ETF (IDEV) and Vanguard Mid-Cap ETF (VO). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, IDEV achieves a 9.59% return, which is significantly lower than VO's 10.43% return.

IDEV

1D
0.42%
1M
2.88%
YTD
9.59%
6M
11.02%
1Y
23.58%
3Y*
17.03%
5Y*
8.52%
10Y*
—

VO

1D
0.97%
1M
4.30%
YTD
10.43%
6M
9.31%
1Y
19.60%
3Y*
15.74%
5Y*
7.79%
10Y*
11.77%
*Multi-year figures are annualized to reflect compound growth (CAGR)

IDEV vs. VO - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
IDEV
iShares Core MSCI International Developed Markets ETF		9.59%32.56%4.54%17.36%-14.99%13.00%8.32%23.12%-14.10%17.43%
VO
Vanguard Mid-Cap ETF		10.43%11.62%15.31%16.03%-18.73%24.70%18.10%30.98%-9.24%13.77%

Correlation

The correlation between IDEV and VO is 0.74, 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

0.74

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

0.75

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

0.79

Correlation (All Time)
Calculated using the full available price history since Mar 23, 2017

0.78

The correlation between IDEV and VO has been stable across timeframes, ranging from 0.74 to 0.79 - a consistent structural relationship.

IDEV vs. VO - Sectors Allocation Comparison

Sectors
IDEV
VO

Financial Services

24.0%
12.8%

Industrials

18.8%
17.9%

Technology

11.1%
18.6%

Healthcare

8.5%
7.6%

Basic Materials

8.3%
4.2%

Consumer Cyclical

7.7%
8.6%

Consumer Defensive

5.8%
4.8%

Energy

5.4%
8.5%

Communication Services

4.3%
3.1%

Utilities

3.4%
8.3%

Real Estate

2.7%
5.4%

Financial Services

IDEV
24.0%
VO
12.8%

Industrials

IDEV
18.8%
VO
17.9%

Technology

IDEV
11.1%
VO
18.6%

Healthcare

IDEV
8.5%
VO
7.6%

Basic Materials

IDEV
8.3%
VO
4.2%

Consumer Cyclical

IDEV
7.7%
VO
8.6%

Consumer Defensive

IDEV
5.8%
VO
4.8%

Energy

IDEV
5.4%
VO
8.5%

Communication Services

IDEV
4.3%
VO
3.1%

Utilities

IDEV
3.4%
VO
8.3%

Real Estate

IDEV
2.7%
VO
5.4%

Compare stocks, funds, or ETFs

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

iShares Core MSCI International Developed Markets ETF

Vanguard Mid-Cap ETF

Often compared with IDEV:
IDEV vs. VYMIIDEV vs. VEAIDEV vs. IEFAIDEV vs. IXUSIDEV vs. SCHFIDEV vs. FDEVIDEV vs. VEU
Often compared with VO:
VO vs. VOOVO vs. VOTVO vs. IJHVO vs. VOEVO vs. VIMAXVO vs. VXFVO vs. SCHM

Return for Risk

IDEV vs. VO — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
IDEV
IDEV Risk / Return Rank: 4848
Overall Rank
IDEV Sharpe Ratio Rank: 4848
Sharpe Ratio Rank
IDEV Sortino Ratio Rank: 4848
Sortino Ratio Rank
IDEV Omega Ratio Rank: 4747
Omega Ratio Rank
IDEV Calmar Ratio Rank: 4545
Calmar Ratio Rank
IDEV Martin Ratio Rank: 5252
Martin Ratio Rank
VO
VO Risk / Return Rank: 4949
Overall Rank
VO Sharpe Ratio Rank: 4747
Sharpe Ratio Rank
VO Sortino Ratio Rank: 4646
Sortino Ratio Rank
VO Omega Ratio Rank: 4444
Omega Ratio Rank
VO Calmar Ratio Rank: 5151
Calmar Ratio Rank
VO Martin Ratio Rank: 5555
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.

IDEV vs. VO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Core MSCI International Developed Markets ETF (IDEV) and Vanguard Mid-Cap ETF (VO). 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.

IDEVVODifference
Sharpe ratioReturn per unit of total volatility
1.48
1.43

+0.05

Sortino ratioReturn per unit of downside risk
2.11
2.05

+0.06

Omega ratioGain probability vs. loss probability

1.27

1.25

+0.02

Calmar ratioReturn relative to maximum drawdown

1.99

2.23

-0.25

Martin ratioReturn relative to average drawdown

7.76

8.44

-0.68

IDEV vs. VO - Sharpe Ratio Comparison

The current IDEV Sharpe Ratio is 1.48, which is comparable to the VO Sharpe Ratio of 1.43. The chart below compares the historical Sharpe Ratios of IDEV and VO, 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

IDEV vs. VO - Drawdown Comparison

The maximum IDEV drawdown since its inception was -34.77%, smaller than the maximum VO drawdown of -58.87%. Use the drawdown chart below to compare losses from any high point for IDEV and VO.

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Drawdown Indicators

IDEVVODifference

Max Drawdown

Largest peak-to-trough decline

-34.77%

-58.87%

+24.10%

Max Drawdown (1Y)

Largest decline over 1 year

-11.20%

-8.17%

-3.03%

Max Drawdown (3Y)

Largest decline over 3 years

-13.41%

-19.02%

+5.61%

Max Drawdown (5Y)

Largest decline over 5 years

-29.15%

-27.57%

-1.58%

Max Drawdown (10Y)

Largest decline over 10 years

—

-39.37%

—

Current Drawdown

Current decline from peak

-0.37%

-0.45%

+0.08%

Average Drawdown

Average peak-to-trough decline

-6.55%

-7.85%

+1.30%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.87%

2.16%

+0.71%

Volatility

IDEV vs. VO - Volatility Comparison

iShares Core MSCI International Developed Markets ETF (IDEV) has a higher volatility of 5.30% compared to Vanguard Mid-Cap ETF (VO) at 4.31%. This indicates that IDEV's price experiences larger fluctuations and is considered to be riskier than VO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

IDEVVODifference

Volatility (1M)

Calculated over the trailing 1-month period

5.30%

4.31%

+0.99%

Volatility (6M)

Calculated over the trailing 6-month period

12.73%

9.71%

+3.02%

Volatility (1Y)

Calculated over the trailing 1-year period

15.07%

12.74%

+2.33%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

16.35%

17.65%

-1.30%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

17.29%

18.96%

-1.67%

IDEV vs. VO - Expense Ratio Comparison

IDEV has a 0.05% expense ratio, which is higher than VO's 0.03% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

IDEV vs. VO - Dividend Comparison

IDEV's dividend yield for the trailing twelve months is around 3.11%, more than VO's 1.36% yield.

PositionTTM20252024202320222021202020192018201720162015
IDEV
iShares Core MSCI International Developed Markets ETF		3.11%3.40%3.30%3.07%2.69%3.05%2.00%3.18%3.16%1.54%0.00%0.00%
VO
Vanguard Mid-Cap ETF		1.36%1.52%1.49%1.52%1.60%1.12%1.45%1.48%1.82%1.35%1.45%1.47%

Frequently Asked Questions

IDEV and VO have a correlation of 0.74, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

IDEV has higher volatility (5.30%) compared to VO (4.31%). In terms of maximum drawdown, IDEV dropped -34.77% vs VO's -58.87%.

On 5-year performance, IDEV leads with 8.52% vs 7.79% for VO. On fees, VO is cheaper at 0.03% per year. On volatility, VO has been the lower-risk option at 4.31%. The better choice depends on whether you care most about return, fees, risk, or income.

Over the 5-year period, IDEV has performed better with a 8.52% return vs 7.79%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

VO is cheaper with a 0.03% expense ratio, compared with 0.05% for IDEV.

IDEV has the higher dividend yield at 3.11%, compared with 1.36% for VO.

IDEV is categorized as Foreign Large Cap Equities, while VO is Mid Cap Blend Equities. IDEV tracks MSCI World ex USA Investable Market Index, while VO tracks CRSP US Mid Cap Index. They also come from different issuers: iShares and Vanguard. Their fees differ too: 0.05% for IDEV and 0.03% for VO.

IDEV currently has the higher Sharpe Ratio (1.48 vs 1.43), 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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