MDIIX vs. BDBKX

Last updated Apr 1, 2026

Compare and contrast key facts about iShares MSCI EAFE International Index Fund (MDIIX) and iShares Russell 2000 Small-Cap Index Fund Class K (BDBKX).

MDIIX is a passively managed fund by iShares that tracks the performance of the MSCI EAFE Index (Net). It was launched on Apr 9, 1997. BDBKX is a passively managed fund by iShares that tracks the performance of the Russell 2000 Index. It was launched on Apr 1, 2011. Both MDIIX and BDBKX are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

MDIIX vs. BDBKX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares MSCI EAFE International Index Fund (MDIIX) and iShares Russell 2000 Small-Cap Index Fund Class K (BDBKX). The values are adjusted to include any dividend payments, if applicable.

MDIIX vs. BDBKX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MDIIX iShares MSCI EAFE International Index Fund	-1.98%	31.36%	3.36%	18.04%	-14.33%	10.98%	7.68%	21.55%	-13.62%	24.84%
BDBKX iShares Russell 2000 Small-Cap Index Fund Class K	-2.46%	12.81%	11.40%	17.04%	-20.32%	14.59%	20.02%	25.66%	-11.01%	14.71%

Returns By Period

In the year-to-date period, MDIIX achieves a -1.98% return, which is significantly higher than BDBKX's -2.46% return. Over the past 10 years, MDIIX has underperformed BDBKX with an annualized return of 8.27%, while BDBKX has yielded a comparatively higher 9.49% annualized return.

MDIIX

• 1D: 0.37%
• 1M: -10.85%
• YTD: -1.98%
• 6M: 2.27%
• 1Y: 19.23%
• 3Y*: 13.10%
• 5Y*: 7.63%
• 10Y*: 8.27%

BDBKX

• 1D: -1.43%
• 1M: -8.15%
• YTD: -2.46%
• 6M: -0.33%
• 1Y: 21.55%
• 3Y*: 11.76%
• 5Y*: 3.06%
• 10Y*: 9.49%

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

MDIIX vs. BDBKX - Expense Ratio Comparison

MDIIX has a 0.35% expense ratio, which is higher than BDBKX's 0.07% expense ratio.

MDIIX

iShares MSCI EAFE International Index Fund

BDBKX

iShares Russell 2000 Small-Cap Index Fund Class K

Return for Risk

MDIIX vs. BDBKX — Risk / Return Rank

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

MDIIX

MDIIX Risk / Return Rank: 57
MDIIX Sharpe Ratio Rank: 56
MDIIX Sortino Ratio Rank: 55
MDIIX Omega Ratio Rank: 52
MDIIX Calmar Ratio Rank: 64
MDIIX Martin Ratio Rank: 59

BDBKX

BDBKX Risk / Return Rank: 46
BDBKX Sharpe Ratio Rank: 43
BDBKX Sortino Ratio Rank: 47
BDBKX Omega Ratio Rank: 36
BDBKX Calmar Ratio Rank: 54
BDBKX Martin Ratio Rank: 51

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.

MDIIX vs. BDBKX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares MSCI EAFE International Index Fund (MDIIX) and iShares Russell 2000 Small-Cap Index Fund Class K (BDBKX). 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.

	MDIIX	BDBKX	Difference
Sharpe ratio Return per unit of total volatility	1.08	0.91	+0.17
Sortino ratio Return per unit of downside risk	1.51	1.40	+0.11
Omega ratio Gain probability vs. loss probability	1.22	1.18	+0.04
Calmar ratio Return relative to maximum drawdown	1.51	1.33	+0.18
Martin ratio Return relative to average drawdown	5.76	5.03	+0.73
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MDIIX vs. BDBKX - Sharpe Ratio Comparison

The current MDIIX Sharpe Ratio is 1.08, which is comparable to the BDBKX Sharpe Ratio of 0.91. The chart below compares the historical Sharpe Ratios of MDIIX and BDBKX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	MDIIX	BDBKX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.08	0.91	+0.17
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.48	0.13	+0.35
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.50	0.40	+0.10
Sharpe Ratio (All Time) Calculated using the full available price history	0.28	0.38	-0.10

Correlation

The correlation between MDIIX and BDBKX is 0.72, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

MDIIX vs. BDBKX - Dividend Comparison

MDIIX's dividend yield for the trailing twelve months is around 3.56%, more than BDBKX's 3.25% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
MDIIX iShares MSCI EAFE International Index Fund	3.56%	3.49%	3.15%	2.94%	2.52%	2.78%	1.72%	3.05%	4.24%	2.21%	2.60%	1.94%
BDBKX iShares Russell 2000 Small-Cap Index Fund Class K	3.25%	3.17%	4.84%	2.96%	1.76%	7.67%	1.45%	3.47%	4.29%	3.18%	4.62%	3.64%

Drawdowns

MDIIX vs. BDBKX - Drawdown Comparison

The maximum MDIIX drawdown since its inception was -61.26%, which is greater than BDBKX's maximum drawdown of -41.66%. Use the drawdown chart below to compare losses from any high point for MDIIX and BDBKX.

Drawdown Indicators

	MDIIX	BDBKX	Difference
Max Drawdown Largest peak-to-trough decline	-61.26%	-41.66%	-19.60%
Max Drawdown (1Y) Largest decline over 1 year	-11.32%	-13.89%	+2.57%
Max Drawdown (5Y) Largest decline over 5 years	-29.43%	-31.96%	+2.53%
Max Drawdown (10Y) Largest decline over 10 years	-34.34%	-41.66%	+7.32%
Current Drawdown Current decline from peak	-10.89%	-10.97%	+0.08%
Average Drawdown Average peak-to-trough decline	-15.65%	-8.83%	-6.82%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.96%	3.67%	-0.71%

Volatility

MDIIX vs. BDBKX - Volatility Comparison

iShares MSCI EAFE International Index Fund (MDIIX) has a higher volatility of 7.04% compared to iShares Russell 2000 Small-Cap Index Fund Class K (BDBKX) at 6.59%. This indicates that MDIIX's price experiences larger fluctuations and is considered to be riskier than BDBKX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MDIIX	BDBKX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.04%	6.59%	+0.45%
Volatility (6M) Calculated over the trailing 6-month period	10.75%	14.10%	-3.35%
Volatility (1Y) Calculated over the trailing 1-year period	16.91%	23.12%	-6.21%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.94%	23.15%	-7.21%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.56%	23.65%	-7.09%