IIIIX vs. VTSNX

Last updated Jun 23, 2026

IIIIX (Voya International Index Portfolio) and VTSNX (Vanguard Total International Stock Index Fund Institutional Shares) are both Foreign Large Cap Equities funds. Over the past 10 years, IIIIX returned 9.17%/yr vs 10.01%/yr for VTSNX. With a 0.96 correlation, they move nearly in lockstep. IIIIX charges 0.45%/yr vs 0.08%/yr for VTSNX.

Performance

IIIIX vs. VTSNX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Voya International Index Portfolio (IIIIX) and Vanguard Total International Stock Index Fund Institutional Shares (VTSNX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IIIIX achieves a 10.48% return, which is significantly lower than VTSNX's 15.62% return. Over the past 10 years, IIIIX has underperformed VTSNX with an annualized return of 9.17%, while VTSNX has yielded a comparatively higher 10.01% annualized return.

IIIIX

• 1D: 0.81%
• 1M: 1.97%
• YTD: 10.48%
• 6M: 10.87%
• 1Y: 23.54%
• 3Y*: 15.69%
• 5Y*: 8.89%
• 10Y*: 9.17%

VTSNX

• 1D: 1.34%
• 1M: 3.10%
• YTD: 15.62%
• 6M: 16.33%
• 1Y: 34.04%
• 3Y*: 18.62%
• 5Y*: 9.28%
• 10Y*: 10.01%

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

IIIIX vs. VTSNX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IIIIX Voya International Index Portfolio	10.48%	30.88%	3.03%	17.70%	-14.60%	10.83%	7.87%	21.37%	-13.73%	24.91%
VTSNX Vanguard Total International Stock Index Fund Institutional Shares	15.62%	32.24%	5.38%	15.29%	-15.99%	8.64%	11.27%	21.69%	-14.41%	27.54%

Correlation

The correlation between IIIIX and VTSNX is 0.88, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.88
Correlation (3Y) Calculated over the trailing 3-year period	0.87
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.94
Correlation (All Time) Calculated using the full available price history since Jan 3, 2011	0.96

The correlation between IIIIX and VTSNX has been stable across timeframes, ranging from 0.87 to 0.96 - a consistent structural relationship.

Return for Risk

IIIIX vs. VTSNX — Risk / Return Rank

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

IIIIX

IIIIX Risk / Return Rank: 34
IIIIX Sharpe Ratio Rank: 32
IIIIX Sortino Ratio Rank: 30
IIIIX Omega Ratio Rank: 31
IIIIX Calmar Ratio Rank: 39
IIIIX Martin Ratio Rank: 40

VTSNX

VTSNX Risk / Return Rank: 64
VTSNX Sharpe Ratio Rank: 67
VTSNX Sortino Ratio Rank: 60
VTSNX Omega Ratio Rank: 66
VTSNX Calmar Ratio Rank: 64
VTSNX Martin Ratio Rank: 61

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.

IIIIX vs. VTSNX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Voya International Index Portfolio (IIIIX) and Vanguard Total International Stock Index Fund Institutional Shares (VTSNX). 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.

	IIIIX	VTSNX	Difference
Sharpe ratio: Return per unit of total volatility	1.50	2.20	-0.70
Sortino ratio: Return per unit of downside risk	2.12	2.97	-0.85
Omega ratio: Gain probability vs. loss probability	1.27	1.41	-0.14
Calmar ratio: Return relative to maximum drawdown	2.27	2.94	-0.67
Martin ratio: Return relative to average drawdown	8.14	11.45	-3.31

IIIIX vs. VTSNX - Sharpe Ratio Comparison

The current IIIIX Sharpe Ratio is 1.50, which is lower than the VTSNX Sharpe Ratio of 2.20. The chart below compares the historical Sharpe Ratios of IIIIX and VTSNX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

IIIIX vs. VTSNX - Drawdown Comparison

The maximum IIIIX drawdown since its inception was -58.10%, which is greater than VTSNX's maximum drawdown of -35.72%. Use the drawdown chart below to compare losses from any high point for IIIIX and VTSNX.

Drawdown Indicators

	IIIIX	VTSNX	Difference
Max Drawdown Largest peak-to-trough decline	-58.10%	-35.72%	-22.38%
Max Drawdown (1Y) Largest decline over 1 year	-11.58%	-11.29%	-0.29%
Max Drawdown (3Y) Largest decline over 3 years	-13.71%	-13.14%	-0.57%
Max Drawdown (5Y) Largest decline over 5 years	-29.79%	-29.50%	-0.29%
Max Drawdown (10Y) Largest decline over 10 years	-34.34%	-35.72%	+1.38%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-12.39%	-8.08%	-4.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.09%	2.90%	+0.19%

Volatility

IIIIX vs. VTSNX - Volatility Comparison

The current volatility for Voya International Index Portfolio (IIIIX) is 5.08%, while Vanguard Total International Stock Index Fund Institutional Shares (VTSNX) has a volatility of 6.12%. This indicates that IIIIX experiences smaller price fluctuations and is considered to be less risky than VTSNX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IIIIX	VTSNX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.08%	6.12%	-1.04%
Volatility (6M) Calculated over the trailing 6-month period	14.13%	13.05%	+1.08%
Volatility (1Y) Calculated over the trailing 1-year period	17.50%	15.09%	+2.41%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.02%	15.21%	+1.81%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.10%	15.97%	+1.13%

IIIIX vs. VTSNX - Expense Ratio Comparison

IIIIX has a 0.45% expense ratio, which is higher than VTSNX's 0.08% expense ratio.

Dividends

IIIIX vs. VTSNX - Dividend Comparison

IIIIX's dividend yield for the trailing twelve months is around 4.15%, more than VTSNX's 2.52% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IIIIX Voya International Index Portfolio	4.15%	2.22%	2.94%	4.82%	3.64%	2.02%	2.43%	2.90%	3.21%	2.21%	3.12%	3.29%
VTSNX Vanguard Total International Stock Index Fund Institutional Shares	2.52%	3.17%	3.36%	3.24%	3.08%	3.08%	2.13%	3.16%	3.19%	2.75%	2.95%	2.86%

Frequently Asked Questions

Can I hold both IIIIX and VTSNX in my portfolio?

IIIIX and VTSNX have a correlation of 0.88, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IIIIX or VTSNX?

VTSNX has higher volatility (6.12%) compared to IIIIX (5.08%). In terms of maximum drawdown, IIIIX dropped -58.10% vs VTSNX's -35.72%.

Which has better risk-adjusted returns?

VTSNX currently has the higher Sharpe Ratio (2.20 vs 1.50), 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.