BRWIX vs. GWMEX

Last updated Jun 23, 2026

BRWIX (AMG Boston Common Global Impact Fund) and GWMEX (AMG GW&K Municipal Enhanced Yield Fund) are both mutual funds - BRWIX is a Large Cap Growth Equities fund managed by AMG, while GWMEX is a High Yield Muni fund managed by AMG. Over the past 10 years, BRWIX returned 11.21%/yr vs 3.40%/yr for GWMEX. At a correlation of -0.04, they often move in opposite directions. BRWIX charges 0.93%/yr vs 0.64%/yr for GWMEX.

Performance

BRWIX vs. GWMEX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AMG Boston Common Global Impact Fund (BRWIX) and AMG GW&K Municipal Enhanced Yield Fund (GWMEX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BRWIX achieves a 15.59% return, which is significantly higher than GWMEX's 2.65% return. Over the past 10 years, BRWIX has outperformed GWMEX with an annualized return of 11.21%, while GWMEX has yielded a comparatively lower 3.40% annualized return.

BRWIX

• 1D: 1.77%
• 1M: 1.71%
• YTD: 15.59%
• 6M: 15.59%
• 1Y: 35.06%
• 3Y*: 13.55%
• 5Y*: 5.41%
• 10Y*: 11.21%

GWMEX

• 1D: 0.11%
• 1M: 2.40%
• YTD: 2.65%
• 6M: 3.00%
• 1Y: 8.44%
• 3Y*: 4.23%
• 5Y*: 1.74%
• 10Y*: 3.40%

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

BRWIX vs. GWMEX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BRWIX AMG Boston Common Global Impact Fund	15.59%	21.16%	3.08%	13.75%	-25.35%	12.38%	29.77%	27.98%	-3.67%	23.65%
GWMEX AMG GW&K Municipal Enhanced Yield Fund	2.65%	2.50%	2.61%	10.89%	-17.86%	15.05%	6.32%	12.51%	-0.06%	9.79%

Correlation

The correlation between BRWIX and GWMEX is 0.24, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.24
Correlation (3Y) Calculated over the trailing 3-year period	0.21
Correlation (5Y) Calculated over the trailing 5-year period	0.19
Correlation (10Y) Calculated over the trailing 10-year period	0.09
Correlation (All Time) Calculated using the full available price history since Jan 3, 2006	-0.04

The correlation between BRWIX and GWMEX shifts across timeframes, from -0.04 (all time) to 0.24 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

BRWIX vs. GWMEX — Risk / Return Rank

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

BRWIX

BRWIX Risk / Return Rank: 71
BRWIX Sharpe Ratio Rank: 73
BRWIX Sortino Ratio Rank: 69
BRWIX Omega Ratio Rank: 66
BRWIX Calmar Ratio Rank: 70
BRWIX Martin Ratio Rank: 78

GWMEX

GWMEX Risk / Return Rank: 60
GWMEX Sharpe Ratio Rank: 68
GWMEX Sortino Ratio Rank: 76
GWMEX Omega Ratio Rank: 84
GWMEX Calmar Ratio Rank: 37
GWMEX Martin Ratio Rank: 37

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.

BRWIX vs. GWMEX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AMG Boston Common Global Impact Fund (BRWIX) and AMG GW&K Municipal Enhanced Yield Fund (GWMEX). 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.

	BRWIX	GWMEX	Difference
Sharpe ratio: Return per unit of total volatility	2.29	2.21	+0.07
Sortino ratio: Return per unit of downside risk	3.15	3.32	-0.17
Omega ratio: Gain probability vs. loss probability	1.41	1.52	-0.11
Calmar ratio: Return relative to maximum drawdown	3.08	2.19	+0.89
Martin ratio: Return relative to average drawdown	13.56	7.78	+5.78

BRWIX vs. GWMEX - Sharpe Ratio Comparison

The current BRWIX Sharpe Ratio is 2.29, which is comparable to the GWMEX Sharpe Ratio of 2.21. The chart below compares the historical Sharpe Ratios of BRWIX and GWMEX, 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

BRWIX vs. GWMEX - Drawdown Comparison

The maximum BRWIX drawdown since its inception was -54.49%, which is greater than GWMEX's maximum drawdown of -36.30%. Use the drawdown chart below to compare losses from any high point for BRWIX and GWMEX.

Drawdown Indicators

	BRWIX	GWMEX	Difference
Max Drawdown Largest peak-to-trough decline	-54.49%	-36.30%	-18.19%
Max Drawdown (1Y) Largest decline over 1 year	-11.28%	-3.95%	-7.33%
Max Drawdown (3Y) Largest decline over 3 years	-20.82%	-9.08%	-11.74%
Max Drawdown (5Y) Largest decline over 5 years	-36.71%	-24.06%	-12.65%
Max Drawdown (10Y) Largest decline over 10 years	-36.71%	-24.06%	-12.65%
Current Drawdown Current decline from peak	-0.63%	-1.75%	+1.12%
Average Drawdown Average peak-to-trough decline	-17.57%	-5.69%	-11.88%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.56%	1.11%	+1.45%

Volatility

BRWIX vs. GWMEX - Volatility Comparison

AMG Boston Common Global Impact Fund (BRWIX) has a higher volatility of 6.19% compared to AMG GW&K Municipal Enhanced Yield Fund (GWMEX) at 0.91%. This indicates that BRWIX's price experiences larger fluctuations and is considered to be riskier than GWMEX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BRWIX	GWMEX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.19%	0.91%	+5.28%
Volatility (6M) Calculated over the trailing 6-month period	12.79%	2.93%	+9.86%
Volatility (1Y) Calculated over the trailing 1-year period	15.18%	3.90%	+11.28%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.29%	7.80%	+10.49%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.22%	6.75%	+13.47%

BRWIX vs. GWMEX - Expense Ratio Comparison

BRWIX has a 0.93% expense ratio, which is higher than GWMEX's 0.64% expense ratio.

Dividends

BRWIX vs. GWMEX - Dividend Comparison

BRWIX's dividend yield for the trailing twelve months is around 0.65%, less than GWMEX's 3.40% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BRWIX AMG Boston Common Global Impact Fund	0.65%	0.75%	1.17%	0.63%	0.48%	45.72%	14.71%	10.30%	0.00%	0.00%	0.00%	0.00%
GWMEX AMG GW&K Municipal Enhanced Yield Fund	3.40%	3.67%	3.38%	3.10%	3.33%	13.26%	3.63%	4.59%	5.82%	2.97%	7.96%	4.77%

Frequently Asked Questions

Can I hold both BRWIX and GWMEX in my portfolio?

BRWIX and GWMEX have a correlation of 0.24, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BRWIX or GWMEX?

BRWIX has higher volatility (6.19%) compared to GWMEX (0.91%). In terms of maximum drawdown, BRWIX dropped -54.49% vs GWMEX's -36.30%.

Which has better risk-adjusted returns?

BRWIX currently has the higher Sharpe Ratio (2.29 vs 2.21), 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.