VGTSX vs. KGIIX

Last updated Jun 24, 2026

VGTSX (Vanguard Total International Stock Index Fund Investor Shares) and KGIIX (Kopernik International Fund) are both Foreign Large Cap Equities funds. Over the past 10 years, VGTSX returned 10.40%/yr vs 9.34%/yr for KGIIX. A 0.64 correlation means they provide meaningful diversification when combined. VGTSX charges 0.17%/yr vs 1.04%/yr for KGIIX.

Performance

VGTSX vs. KGIIX - Performance Comparison

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

Returns By Period

In the year-to-date period, VGTSX achieves a 15.80% return, which is significantly higher than KGIIX's 4.07% return. Over the past 10 years, VGTSX has outperformed KGIIX with an annualized return of 10.40%, while KGIIX has yielded a comparatively lower 9.34% annualized return.

VGTSX

• 1D: 0.18%
• 1M: 3.31%
• YTD: 15.80%
• 6M: 15.70%
• 1Y: 33.35%
• 3Y*: 19.95%
• 5Y*: 9.07%
• 10Y*: 10.40%

KGIIX

• 1D: -1.10%
• 1M: -4.28%
• YTD: 4.07%
• 6M: 3.46%
• 1Y: 25.88%
• 3Y*: 17.40%
• 5Y*: 8.08%
• 10Y*: 9.34%

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

VGTSX vs. KGIIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VGTSX Vanguard Total International Stock Index Fund Investor Shares	15.80%	32.05%	5.30%	15.18%	-16.07%	8.58%	11.15%	21.44%	-14.47%	27.39%
KGIIX Kopernik International Fund	4.07%	54.97%	-7.01%	13.86%	-14.05%	16.62%	18.94%	16.37%	-6.24%	10.50%

Correlation

The correlation between VGTSX and KGIIX is 0.66, 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	0.66
Correlation (3Y) Calculated over the trailing 3-year period	0.57
Correlation (5Y) Calculated over the trailing 5-year period	0.67
Correlation (10Y) Calculated over the trailing 10-year period	0.64
Correlation (All Time) Calculated using the full available price history since Jan 4, 2016	0.64

The correlation between VGTSX and KGIIX shifts across timeframes, from 0.57 (3 years) to 0.67 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

VGTSX vs. KGIIX — Risk / Return Rank

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

VGTSX

VGTSX Risk / Return Rank: 68
VGTSX Sharpe Ratio Rank: 73
VGTSX Sortino Ratio Rank: 64
VGTSX Omega Ratio Rank: 70
VGTSX Calmar Ratio Rank: 69
VGTSX Martin Ratio Rank: 64

KGIIX

KGIIX Risk / Return Rank: 53
KGIIX Sharpe Ratio Rank: 57
KGIIX Sortino Ratio Rank: 48
KGIIX Omega Ratio Rank: 53
KGIIX Calmar Ratio Rank: 63
KGIIX Martin Ratio Rank: 42

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.

VGTSX vs. KGIIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Total International Stock Index Fund Investor Shares (VGTSX) and Kopernik International Fund (KGIIX). 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.

	VGTSX	KGIIX	Difference
Sharpe ratio: Return per unit of total volatility	2.28	2.05	+0.22
Sortino ratio: Return per unit of downside risk	3.06	2.68	+0.38
Omega ratio: Gain probability vs. loss probability	1.42	1.37	+0.06
Calmar ratio: Return relative to maximum drawdown	3.04	2.92	+0.12
Martin ratio: Return relative to average drawdown	11.81	8.47	+3.34

VGTSX vs. KGIIX - Sharpe Ratio Comparison

The current VGTSX Sharpe Ratio is 2.28, which is comparable to the KGIIX Sharpe Ratio of 2.05. The chart below compares the historical Sharpe Ratios of VGTSX and KGIIX, 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

VGTSX vs. KGIIX - Drawdown Comparison

The maximum VGTSX drawdown since its inception was -61.48%, which is greater than KGIIX's maximum drawdown of -27.81%. Use the drawdown chart below to compare losses from any high point for VGTSX and KGIIX.

Drawdown Indicators

	VGTSX	KGIIX	Difference
Max Drawdown Largest peak-to-trough decline	-61.48%	-27.81%	-33.67%
Max Drawdown (1Y) Largest decline over 1 year	-11.29%	-9.27%	-2.02%
Max Drawdown (3Y) Largest decline over 3 years	-13.11%	-13.58%	+0.47%
Max Drawdown (5Y) Largest decline over 5 years	-29.56%	-27.81%	-1.75%
Max Drawdown (10Y) Largest decline over 10 years	-35.93%	-27.81%	-8.12%
Current Drawdown Current decline from peak	0.00%	-9.27%	+9.27%
Average Drawdown Average peak-to-trough decline	-13.95%	-6.11%	-7.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.90%	3.19%	-0.29%

Volatility

VGTSX vs. KGIIX - Volatility Comparison

Vanguard Total International Stock Index Fund Investor Shares (VGTSX) has a higher volatility of 6.04% compared to Kopernik International Fund (KGIIX) at 3.77%. This indicates that VGTSX's price experiences larger fluctuations and is considered to be riskier than KGIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VGTSX	KGIIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.04%	3.77%	+2.27%
Volatility (6M) Calculated over the trailing 6-month period	13.04%	10.77%	+2.27%
Volatility (1Y) Calculated over the trailing 1-year period	15.11%	13.22%	+1.89%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.20%	13.27%	+1.93%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.95%	12.66%	+3.29%

VGTSX vs. KGIIX - Expense Ratio Comparison

VGTSX has a 0.17% expense ratio, which is lower than KGIIX's 1.04% expense ratio.

Dividends

VGTSX vs. KGIIX - Dividend Comparison

VGTSX's dividend yield for the trailing twelve months is around 2.41%, less than KGIIX's 13.71% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
KGIIX Kopernik International Fund	13.71%	14.26%	0.48%	12.56%	2.46%	5.77%	2.89%	2.50%	1.19%	1.35%	0.33%	0.00%
VGTSX Vanguard Total International Stock Index Fund Investor Shares	2.41%	3.08%	3.26%	3.16%	2.98%	2.99%	2.05%	2.98%	3.09%	2.68%	2.86%	2.77%

Frequently Asked Questions

Can I hold both VGTSX and KGIIX in my portfolio?

VGTSX and KGIIX have a correlation of 0.66, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VGTSX or KGIIX?

VGTSX has higher volatility (6.04%) compared to KGIIX (3.77%). In terms of maximum drawdown, VGTSX dropped -61.48% vs KGIIX's -27.81%.

Which has better risk-adjusted returns?

VGTSX currently has the higher Sharpe Ratio (2.28 vs 2.05), 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.