ACWDX vs. VSGIX

Last updated Jun 4, 2026

ACWDX (AMG GW&K Small/Mid Cap Growth Fund) and VSGIX (Vanguard Small-Cap Growth Index Fund Institutional Shares) are both Small Cap Growth Equities funds. Over the past 10 years, ACWDX returned 10.60%/yr vs 11.86%/yr for VSGIX. Their correlation of 0.94 suggests significant overlap in exposure. ACWDX charges 1.00%/yr vs 0.06%/yr for VSGIX.

Performance

ACWDX vs. VSGIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AMG GW&K Small/Mid Cap Growth Fund (ACWDX) and Vanguard Small-Cap Growth Index Fund Institutional Shares (VSGIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ACWDX achieves a 14.29% return, which is significantly lower than VSGIX's 18.74% return. Over the past 10 years, ACWDX has underperformed VSGIX with an annualized return of 10.60%, while VSGIX has yielded a comparatively higher 11.86% annualized return.

ACWDX

• 1D: 1.28%
• 1M: 3.89%
• YTD: 14.29%
• 6M: 1.86%
• 1Y: 20.80%
• 3Y*: 12.69%
• 5Y*: 5.57%
• 10Y*: 10.60%

VSGIX

• 1D: 0.72%
• 1M: 6.06%
• YTD: 18.74%
• 6M: 18.16%
• 1Y: 34.12%
• 3Y*: 18.14%
• 5Y*: 6.12%
• 10Y*: 11.86%

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

ACWDX vs. VSGIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ACWDX AMG GW&K Small/Mid Cap Growth Fund	14.29%	0.29%	9.27%	21.13%	-22.32%	12.52%	45.63%	20.24%	-5.14%	18.69%
VSGIX Vanguard Small-Cap Growth Index Fund Institutional Shares	18.74%	8.44%	14.95%	23.07%	-28.39%	5.70%	35.29%	32.77%	-5.70%	21.94%

Correlation

The correlation between ACWDX and VSGIX is 0.93, 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	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.94
Correlation (All Time) Calculated using the full available price history since Nov 4, 2010	0.94

The correlation between ACWDX and VSGIX has been stable across timeframes, ranging from 0.93 to 0.95 - a consistent structural relationship.

Return for Risk

ACWDX vs. VSGIX — Risk / Return Rank

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

ACWDX

ACWDX Risk / Return Rank: 15
ACWDX Sharpe Ratio Rank: 15
ACWDX Sortino Ratio Rank: 12
ACWDX Omega Ratio Rank: 18
ACWDX Calmar Ratio Rank: 18
ACWDX Martin Ratio Rank: 14

VSGIX

VSGIX Risk / Return Rank: 48
VSGIX Sharpe Ratio Rank: 41
VSGIX Sortino Ratio Rank: 38
VSGIX Omega Ratio Rank: 35
VSGIX Calmar Ratio Rank: 68
VSGIX 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.

ACWDX vs. VSGIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AMG GW&K Small/Mid Cap Growth Fund (ACWDX) and Vanguard Small-Cap Growth Index Fund Institutional Shares (VSGIX). 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.

	ACWDX	VSGIX	Difference
Sharpe ratio Return per unit of total volatility	1.07	1.86	-0.79
Sortino ratio Return per unit of downside risk	1.43	2.56	-1.13
Omega ratio Gain probability vs. loss probability	1.22	1.31	-0.09
Calmar ratio Return relative to maximum drawdown	1.52	3.17	-1.65
Martin ratio Return relative to average drawdown	4.11	12.10	-7.99
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ACWDX vs. VSGIX - Sharpe Ratio Comparison

The current ACWDX Sharpe Ratio is 1.07, which is lower than the VSGIX Sharpe Ratio of 1.86. The chart below compares the historical Sharpe Ratios of ACWDX and VSGIX, 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

	ACWDX	VSGIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.07	1.86	-0.79
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.26	0.26	-0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.46	0.52	-0.06
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.41	+0.05

Drawdowns

ACWDX vs. VSGIX - Drawdown Comparison

The maximum ACWDX drawdown since its inception was -38.86%, smaller than the maximum VSGIX drawdown of -58.66%. Use the drawdown chart below to compare losses from any high point for ACWDX and VSGIX.

Drawdown Indicators

	ACWDX	VSGIX	Difference
Max Drawdown Largest peak-to-trough decline	-38.86%	-58.66%	+19.80%
Max Drawdown (1Y) Largest decline over 1 year	-14.99%	-11.38%	-3.61%
Max Drawdown (3Y) Largest decline over 3 years	-26.64%	-27.47%	+0.83%
Max Drawdown (5Y) Largest decline over 5 years	-32.74%	-38.36%	+5.62%
Max Drawdown (10Y) Largest decline over 10 years	-38.86%	-38.70%	-0.16%
Current Drawdown Current decline from peak	-0.40%	0.00%	-0.40%
Average Drawdown Average peak-to-trough decline	-10.05%	-11.34%	+1.29%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.52%	2.98%	+2.54%

Volatility

ACWDX vs. VSGIX - Volatility Comparison

AMG GW&K Small/Mid Cap Growth Fund (ACWDX) has a higher volatility of 5.94% compared to Vanguard Small-Cap Growth Index Fund Institutional Shares (VSGIX) at 5.28%. This indicates that ACWDX's price experiences larger fluctuations and is considered to be riskier than VSGIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ACWDX	VSGIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.94%	5.28%	+0.66%
Volatility (6M) Calculated over the trailing 6-month period	18.06%	14.85%	+3.21%
Volatility (1Y) Calculated over the trailing 1-year period	21.37%	19.45%	+1.92%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.94%	23.56%	-1.62%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.39%	22.98%	+0.41%

ACWDX vs. VSGIX - Expense Ratio Comparison

ACWDX has a 1.00% expense ratio, which is higher than VSGIX's 0.06% expense ratio.

Dividends

ACWDX vs. VSGIX - Dividend Comparison

ACWDX has not paid dividends to shareholders, while VSGIX's dividend yield for the trailing twelve months is around 0.45%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACWDX AMG GW&K Small/Mid Cap Growth Fund	0.00%	0.00%	0.74%	0.00%	2.04%	58.27%	4.00%	0.00%	0.00%	0.00%	0.00%	0.02%
VSGIX Vanguard Small-Cap Growth Index Fund Institutional Shares	0.45%	0.55%	0.55%	0.68%	0.56%	0.37%	0.45%	0.58%	0.80%	0.82%	1.09%	0.98%

Frequently Asked Questions

Can I hold both ACWDX and VSGIX in my portfolio?

With a correlation of 0.93, ACWDX and VSGIX 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, ACWDX or VSGIX?

ACWDX has higher volatility (5.94%) compared to VSGIX (5.28%). In terms of maximum drawdown, ACWDX dropped -38.86% vs VSGIX's -58.66%.

Which has better risk-adjusted returns?

VSGIX currently has the higher Sharpe Ratio (1.86 vs 1.07), 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.