BDOKX vs. MDIIX

Last updated Jun 3, 2026

BDOKX (iShares MSCI Total International Index Fund Class K) and MDIIX (iShares MSCI EAFE International Index Fund) are both Foreign Large Cap Equities funds from iShares - BDOKX tracks the MSCI ACWI ex USA Index while MDIIX tracks the MSCI EAFE Index (Net). Both are passively managed. Over the past 10 years, BDOKX returned 9.79%/yr vs 9.05%/yr for MDIIX. With a 0.97 correlation, they move nearly in lockstep. BDOKX charges 0.09%/yr vs 0.35%/yr for MDIIX.

Performance

BDOKX vs. MDIIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares MSCI Total International Index Fund Class K (BDOKX) and iShares MSCI EAFE International Index Fund (MDIIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BDOKX achieves a 15.08% return, which is significantly higher than MDIIX's 9.11% return. Over the past 10 years, BDOKX has outperformed MDIIX with an annualized return of 9.79%, while MDIIX has yielded a comparatively lower 9.05% annualized return.

BDOKX

• 1D: 0.61%
• 1M: 5.01%
• YTD: 15.08%
• 6M: 18.18%
• 1Y: 32.24%
• 3Y*: 19.68%
• 5Y*: 8.49%
• 10Y*: 9.79%

MDIIX

• 1D: -0.29%
• 1M: 2.60%
• YTD: 9.11%
• 6M: 12.08%
• 1Y: 20.75%
• 3Y*: 16.73%
• 5Y*: 8.42%
• 10Y*: 9.05%

*Multi-year figures are annualized to reflect compound growth (CAGR)

BDOKX vs. MDIIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BDOKX iShares MSCI Total International Index Fund Class K	15.08%	32.56%	5.37%	15.26%	-16.40%	7.68%	10.77%	23.11%	-13.91%	26.40%
MDIIX iShares MSCI EAFE International Index Fund	9.11%	31.36%	3.36%	18.04%	-14.33%	10.98%	7.68%	21.55%	-13.62%	24.84%

Correlation

The correlation between BDOKX and MDIIX is 0.95 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.95
Correlation (3Y) Calculated over the trailing 3-year period	0.96
Correlation (5Y) Calculated over the trailing 5-year period	0.97
Correlation (10Y) Calculated over the trailing 10-year period	0.96
Correlation (All Time) Calculated using the full available price history since Jul 1, 2011	0.97

The correlation between BDOKX and MDIIX has been stable across timeframes, ranging from 0.95 to 0.97 - a consistent structural relationship.

Return for Risk

BDOKX vs. MDIIX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

BDOKX

BDOKX Risk / Return Rank: 58
BDOKX Sharpe Ratio Rank: 61
BDOKX Sortino Ratio Rank: 55
BDOKX Omega Ratio Rank: 58
BDOKX Calmar Ratio Rank: 58
BDOKX Martin Ratio Rank: 58

MDIIX

MDIIX Risk / Return Rank: 27
MDIIX Sharpe Ratio Rank: 26
MDIIX Sortino Ratio Rank: 25
MDIIX Omega Ratio Rank: 26
MDIIX Calmar Ratio Rank: 27
MDIIX Martin Ratio Rank: 32

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.

BDOKX vs. MDIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares MSCI Total International Index Fund Class K (BDOKX) and iShares MSCI EAFE International Index Fund (MDIIX). 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.

	BDOKX	MDIIX	Difference
Sharpe ratio Return per unit of total volatility	2.30	1.47	+0.83
Sortino ratio Return per unit of downside risk	3.12	2.11	+1.01
Omega ratio Gain probability vs. loss probability	1.42	1.27	+0.16
Calmar ratio Return relative to maximum drawdown	2.93	1.97	+0.96
Martin ratio Return relative to average drawdown	11.61	7.38	+4.23
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BDOKX vs. MDIIX - Sharpe Ratio Comparison

The current BDOKX Sharpe Ratio is 2.30, which is higher than the MDIIX Sharpe Ratio of 1.47. The chart below compares the historical Sharpe Ratios of BDOKX and MDIIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	BDOKX	MDIIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.30	1.47	+0.83
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.55	0.52	+0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.60	0.55	+0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.39	0.30	+0.09

Drawdowns

BDOKX vs. MDIIX - Drawdown Comparison

The maximum BDOKX drawdown since its inception was -34.22%, smaller than the maximum MDIIX drawdown of -61.26%. Use the drawdown chart below to compare losses from any high point for BDOKX and MDIIX.

Drawdown Indicators

	BDOKX	MDIIX	Difference
Max Drawdown Largest peak-to-trough decline	-34.22%	-61.26%	+27.04%
Max Drawdown (1Y) Largest decline over 1 year	-11.38%	-11.32%	-0.06%
Max Drawdown (3Y) Largest decline over 3 years	-13.54%	-13.67%	+0.13%
Max Drawdown (5Y) Largest decline over 5 years	-30.23%	-29.43%	-0.80%
Max Drawdown (10Y) Largest decline over 10 years	-34.22%	-34.34%	+0.12%
Current Drawdown Current decline from peak	0.00%	-0.80%	+0.80%
Average Drawdown Average peak-to-trough decline	-8.23%	-15.57%	+7.34%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.88%	3.03%	-0.15%

Volatility

BDOKX vs. MDIIX - Volatility Comparison

iShares MSCI Total International Index Fund Class K (BDOKX) has a higher volatility of 4.99% compared to iShares MSCI EAFE International Index Fund (MDIIX) at 4.70%. This indicates that BDOKX's price experiences larger fluctuations and is considered to be riskier than MDIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BDOKX	MDIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.99%	4.70%	+0.29%
Volatility (6M) Calculated over the trailing 6-month period	12.31%	12.21%	+0.10%
Volatility (1Y) Calculated over the trailing 1-year period	14.69%	15.09%	-0.40%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.45%	16.17%	-0.72%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.27%	16.65%	-0.38%

BDOKX vs. MDIIX - Expense Ratio Comparison

BDOKX has a 0.09% expense ratio, which is lower than MDIIX's 0.35% expense ratio.

Dividends

BDOKX vs. MDIIX - Dividend Comparison

BDOKX's dividend yield for the trailing twelve months is around 2.50%, less than MDIIX's 3.20% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BDOKX iShares MSCI Total International Index Fund Class K	2.50%	3.01%	2.84%	2.94%	2.84%	3.01%	1.98%	4.48%	3.28%	1.81%	3.51%	3.87%
MDIIX iShares MSCI EAFE International Index Fund	3.20%	3.49%	3.15%	2.94%	2.52%	2.78%	1.72%	3.05%	4.24%	2.21%	2.60%	1.94%

Frequently Asked Questions

Can I hold both BDOKX and MDIIX in my portfolio?

With a correlation of 0.95, BDOKX and MDIIX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, BDOKX or MDIIX?

BDOKX has higher volatility (4.99%) compared to MDIIX (4.70%). In terms of maximum drawdown, BDOKX dropped -34.22% vs MDIIX's -61.26%.

Which has better risk-adjusted returns?

BDOKX currently has the higher Sharpe Ratio (2.30 vs 1.47), 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.