ACWDX vs. TMDIX

Last updated Jul 15, 2026

ACWDX (AMG GW&K Small/Mid Cap Growth Fund) and TMDIX (AMG TimesSquare Mid Cap Growth Fund) are both mutual funds - ACWDX is a Small Cap Growth Equities fund managed by AMG, while TMDIX is a Mid Cap Growth Equities fund managed by AMG. Over the past 10 years, ACWDX returned 10.63%/yr vs 13.00%/yr for TMDIX. Their correlation of 0.89 suggests significant overlap in exposure. ACWDX charges 1.00%/yr vs 0.98%/yr for TMDIX.

Performance

ACWDX vs. TMDIX - 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 AMG TimesSquare Mid Cap Growth Fund (TMDIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ACWDX achieves a 15.39% return, which is significantly higher than TMDIX's 6.38% return. Over the past 10 years, ACWDX has underperformed TMDIX with an annualized return of 10.63%, while TMDIX has yielded a comparatively higher 13.00% annualized return.

ACWDX

• 1D: -1.38%
• 1M: 0.45%
• 6M: 8.61%
• YTD: 15.39%
• 1Y: 14.99%
• 3Y*: 10.61%
• 5Y*: 4.89%
• 10Y*: 10.63%

TMDIX

• 1D: -1.11%
• 1M: 2.00%
• 6M: 2.88%
• YTD: 6.38%
• 1Y: -4.03%
• 3Y*: 7.58%
• 5Y*: 3.78%
• 10Y*: 13.00%

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

ACWDX vs. TMDIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ACWDX AMG GW&K Small/Mid Cap Growth Fund	15.39%	0.29%	9.27%	21.13%	-22.32%	12.52%	45.63%	20.24%	-5.14%	18.69%
TMDIX AMG TimesSquare Mid Cap Growth Fund	6.38%	-1.76%	10.84%	25.07%	-22.26%	16.75%	33.42%	63.26%	-4.28%	22.66%

Correlation

The correlation between ACWDX and TMDIX is 0.85, 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	0.85
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	0.89
Correlation (All Time) Calculated using the full available price history since Nov 3, 2010	0.89

The correlation between ACWDX and TMDIX has been stable across timeframes, ranging from 0.85 to 0.92 - a consistent structural relationship.

Return for Risk

ACWDX vs. TMDIX — Risk / Return Rank

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

ACWDX

ACWDX Risk / Return Rank: 14
ACWDX Sharpe Ratio Rank: 13
ACWDX Sortino Ratio Rank: 12
ACWDX Omega Ratio Rank: 15
ACWDX Calmar Ratio Rank: 17
ACWDX Martin Ratio Rank: 15

TMDIX

TMDIX Risk / Return Rank: 3
TMDIX Sharpe Ratio Rank: 2
TMDIX Sortino Ratio Rank: 3
TMDIX Omega Ratio Rank: 3
TMDIX Calmar Ratio Rank: 3
TMDIX Martin Ratio Rank: 3

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. TMDIX - 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 AMG TimesSquare Mid Cap Growth Fund (TMDIX). 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.

	ACWDX	TMDIX	Difference
Sharpe ratio: Return per unit of total volatility	0.70	-0.16	+0.87
Sortino ratio: Return per unit of downside risk	1.02	-0.08	+1.10
Omega ratio: Gain probability vs. loss probability	1.15	0.99	+0.16
Calmar ratio: Return relative to maximum drawdown	1.04	-0.13	+1.17
Martin ratio: Return relative to average drawdown	2.81	-0.26	+3.06

ACWDX vs. TMDIX - Sharpe Ratio Comparison

The current ACWDX Sharpe Ratio is 0.70, which is higher than the TMDIX Sharpe Ratio of -0.16. The chart below compares the historical Sharpe Ratios of ACWDX and TMDIX, 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

ACWDX vs. TMDIX - Drawdown Comparison

The maximum ACWDX drawdown since its inception was -38.86%, smaller than the maximum TMDIX drawdown of -48.73%. Use the drawdown chart below to compare losses from any high point for ACWDX and TMDIX.

Drawdown Indicators

	ACWDX	TMDIX	Difference
Max Drawdown Largest peak-to-trough decline	-38.86%	-48.73%	+9.87%
Max Drawdown (1Y) Largest decline over 1 year	-14.99%	-25.45%	+10.46%
Max Drawdown (3Y) Largest decline over 3 years	-26.64%	-25.45%	-1.19%
Max Drawdown (5Y) Largest decline over 5 years	-32.74%	-30.53%	-2.21%
Max Drawdown (10Y) Largest decline over 10 years	-38.86%	-35.44%	-3.42%
Current Drawdown Current decline from peak	-3.86%	-10.93%	+7.07%
Average Drawdown Average peak-to-trough decline	-9.99%	-7.18%	-2.81%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.55%	12.66%	-7.11%

Volatility

ACWDX vs. TMDIX - Volatility Comparison

AMG GW&K Small/Mid Cap Growth Fund (ACWDX) has a higher volatility of 6.28% compared to AMG TimesSquare Mid Cap Growth Fund (TMDIX) at 5.75%. This indicates that ACWDX's price experiences larger fluctuations and is considered to be riskier than TMDIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ACWDX	TMDIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.28%	5.75%	+0.53%
Volatility (6M) Calculated over the trailing 6-month period	14.86%	13.80%	+1.06%
Volatility (1Y) Calculated over the trailing 1-year period	22.28%	20.45%	+1.83%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.13%	20.56%	+1.57%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.35%	21.09%	+2.26%

ACWDX vs. TMDIX - Expense Ratio Comparison

ACWDX has a 1.00% expense ratio, which is higher than TMDIX's 0.98% expense ratio.

Dividends

ACWDX vs. TMDIX - Dividend Comparison

Neither ACWDX nor TMDIX has paid dividends to shareholders.

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%
TMDIX AMG TimesSquare Mid Cap Growth Fund	0.00%	0.00%	8.08%	3.98%	3.69%	29.72%	18.28%	31.06%	16.38%	14.44%	5.90%	7.73%

Frequently Asked Questions

Can I hold both ACWDX and TMDIX in my portfolio?

ACWDX and TMDIX have a correlation of 0.85, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ACWDX or TMDIX?

ACWDX has higher volatility (6.28%) compared to TMDIX (5.75%). In terms of maximum drawdown, ACWDX dropped -38.86% vs TMDIX's -48.73%.

Which has better risk-adjusted returns?

ACWDX currently has the higher Sharpe Ratio (0.70 vs -0.16), 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.