CIGIX vs. VGTSX

Last updated Jun 24, 2026

CIGIX (Calamos International Growth Fund) and VGTSX (Vanguard Total International Stock Index Fund Investor Shares) are both Foreign Large Cap Equities funds. Over the past 10 years, CIGIX returned 11.43%/yr vs 10.40%/yr for VGTSX. Their correlation of 0.92 suggests significant overlap in exposure. CIGIX charges 0.85%/yr vs 0.17%/yr for VGTSX.

Performance

CIGIX vs. VGTSX - Performance Comparison

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

Returns By Period

In the year-to-date period, CIGIX achieves a 38.33% return, which is significantly higher than VGTSX's 15.80% return. Over the past 10 years, CIGIX has outperformed VGTSX with an annualized return of 11.43%, while VGTSX has yielded a comparatively lower 10.40% annualized return.

CIGIX

• 1D: 1.93%
• 1M: 8.32%
• YTD: 38.33%
• 6M: 38.39%
• 1Y: 53.05%
• 3Y*: 27.14%
• 5Y*: 5.65%
• 10Y*: 11.43%

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%

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

CIGIX vs. VGTSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CIGIX Calamos International Growth Fund	38.33%	23.11%	12.51%	15.33%	-30.54%	-8.98%	44.95%	29.69%	-20.93%	39.54%
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%

Correlation

The correlation between CIGIX and VGTSX 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	0.88
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.92
Correlation (All Time) Calculated using the full available price history since Mar 17, 2005	0.92

The correlation between CIGIX and VGTSX has been stable across timeframes, ranging from 0.88 to 0.92 - a consistent structural relationship.

Return for Risk

CIGIX vs. VGTSX — Risk / Return Rank

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

CIGIX

CIGIX Risk / Return Rank: 66
CIGIX Sharpe Ratio Rank: 66
CIGIX Sortino Ratio Rank: 56
CIGIX Omega Ratio Rank: 60
CIGIX Calmar Ratio Rank: 80
CIGIX Martin Ratio Rank: 69

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

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.

CIGIX vs. VGTSX - Risk-Adjusted Trends Comparison

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

	CIGIX	VGTSX	Difference
Sharpe ratio: Return per unit of total volatility	2.19	2.28	-0.09
Sortino ratio: Return per unit of downside risk	2.88	3.06	-0.17
Omega ratio: Gain probability vs. loss probability	1.39	1.42	-0.03
Calmar ratio: Return relative to maximum drawdown	3.46	3.04	+0.42
Martin ratio: Return relative to average drawdown	12.44	11.81	+0.63

CIGIX vs. VGTSX - Sharpe Ratio Comparison

The current CIGIX Sharpe Ratio is 2.19, which is comparable to the VGTSX Sharpe Ratio of 2.28. The chart below compares the historical Sharpe Ratios of CIGIX and VGTSX, 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

CIGIX vs. VGTSX - Drawdown Comparison

The maximum CIGIX drawdown since its inception was -64.46%, roughly equal to the maximum VGTSX drawdown of -61.48%. Use the drawdown chart below to compare losses from any high point for CIGIX and VGTSX.

Drawdown Indicators

	CIGIX	VGTSX	Difference
Max Drawdown Largest peak-to-trough decline	-64.46%	-61.48%	-2.98%
Max Drawdown (1Y) Largest decline over 1 year	-15.88%	-11.29%	-4.59%
Max Drawdown (3Y) Largest decline over 3 years	-19.38%	-13.11%	-6.27%
Max Drawdown (5Y) Largest decline over 5 years	-50.15%	-29.56%	-20.59%
Max Drawdown (10Y) Largest decline over 10 years	-50.15%	-35.93%	-14.22%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-15.26%	-13.95%	-1.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.40%	2.90%	+1.50%

Volatility

CIGIX vs. VGTSX - Volatility Comparison

Calamos International Growth Fund (CIGIX) has a higher volatility of 12.06% compared to Vanguard Total International Stock Index Fund Investor Shares (VGTSX) at 6.04%. This indicates that CIGIX's price experiences larger fluctuations and is considered to be riskier than VGTSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CIGIX	VGTSX	Difference
Volatility (1M) Calculated over the trailing 1-month period	12.06%	6.04%	+6.02%
Volatility (6M) Calculated over the trailing 6-month period	22.22%	13.04%	+9.18%
Volatility (1Y) Calculated over the trailing 1-year period	25.12%	15.11%	+10.01%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.60%	15.20%	+6.40%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.23%	15.95%	+4.28%

CIGIX vs. VGTSX - Expense Ratio Comparison

CIGIX has a 0.85% expense ratio, which is higher than VGTSX's 0.17% expense ratio.

Dividends

CIGIX vs. VGTSX - Dividend Comparison

CIGIX's dividend yield for the trailing twelve months is around 9.75%, more than VGTSX's 2.41% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CIGIX Calamos International Growth Fund	9.75%	13.49%	4.54%	0.28%	0.00%	0.33%	5.42%	0.00%	13.25%	3.76%	0.00%	0.13%
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 CIGIX and VGTSX in my portfolio?

CIGIX and VGTSX 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, CIGIX or VGTSX?

CIGIX has higher volatility (12.06%) compared to VGTSX (6.04%). In terms of maximum drawdown, CIGIX dropped -64.46% vs VGTSX's -61.48%.

Which has better risk-adjusted returns?

VGTSX currently has the higher Sharpe Ratio (2.28 vs 2.19), 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.