GWMZX Performance — AMG GW&K Municipal Enhanced Yield Fund, Class Z
Data updated: 2026-08-28
GWMZX returned +3.55% year to date and +9.09% over one year to Jun 2026. Annualised returns are +4.50% over 3 years and −0.04% over 5 years. The fund beat its Long-Term Municipal Bond category average: $100 invested three years ago grew to $114, against $112 for the category, and to $109 over one year, against $108. Volatility over the past three years was 8.43% a year. In the 12 months to Jun 2026 the fund lost a net $12.8M, and assets reached $161.52M.
GWMZX Growth of $100
What $100 invested in AMG GW&K Municipal Enhanced Yield Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Long-Term Municipal Bond category average over the same months.
| Period | GWMZX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $109 | $108 |
| 3 years (Jul 2023 – Jun 2026) | $114 | $112 |
| 5 years (Jul 2021 – Jun 2026) | $100 | $103 |
| Since data start (Jul 2019 – Jun 2026) | $114 | $113 |
GWMZX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +3.55% |
| 1 year | +9.09% |
| 3 years (annualised) | +4.50% |
| 5 years (annualised) | −0.04% |
GWMZX Annual Returns
Calendar-year total returns of AMG GW&K Municipal Enhanced Yield Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +3.55% |
| 2025 | +2.57% |
| 2024 | +2.67% |
| 2023 | +10.95% |
| 2022 | −17.81% |
| 2021 | +3.99% |
| 2020 | +6.39% |
| 2019 (Jul–Dec) | +3.19% |
GWMZX Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +0.2% | +1.9% | −2.7% | +2.0% | +1.0% | +1.2% | — | — | — | — | — | — |
| 2025 | +0.1% | +1.4% | −2.5% | −1.5% | −0.7% | +0.7% | −1.6% | +0.8% | +4.2% | +1.7% | +0.3% | −0.1% |
| 2024 | −0.1% | 0.0% | +0.2% | −1.5% | +0.3% | +2.1% | +1.0% | +0.9% | +1.5% | −1.9% | +2.2% | −1.9% |
| 2023 | +5.5% | −3.0% | +2.6% | +0.5% | −0.9% | +1.4% | +0.6% | −2.0% | −4.1% | −2.7% | +9.8% | +3.5% |
| 2022 | −3.8% | −1.1% | −4.7% | −5.2% | +1.4% | −4.2% | +4.7% | −3.8% | −6.7% | −2.2% | +8.2% | −0.9% |
| 2021 | +1.5% | −2.8% | +1.1% | +2.0% | +1.1% | +0.8% | +1.1% | −0.9% | −1.5% | −0.5% | +1.9% | +0.2% |
| 2020 | +2.6% | +2.6% | −9.2% | −3.4% | +5.0% | +3.4% | +2.8% | −0.5% | −0.6% | −0.3% | +3.0% | +1.6% |
| 2019 | — | — | — | — | — | — | +0.7% | +2.7% | −0.9% | 0.0% | +0.2% | +0.4% |
GWMZX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 8.43%
- 3-year Sharpe ratio: -0.00 (vs 4.5% risk-free rate)
- Best month: +9.83% (Nov 2023)
- Worst month: −4.07% (Sep 2023)
GWMZX Fund Flows
Monthly money in and out of AMG GW&K Municipal Enhanced Yield Fund, from SEC Form N-PORT.
- 12-month net flow: −$12.8M
- 12-month gross sales (incl. reinvestments): $50.4M
- Sales ÷ redemptions: 0.80×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $4.7M | $5.1M | −$443K |
| May 2026 | $5.9M | $4.1M | $1.7M |
| Apr 2026 | $3.3M | $4.6M | −$1.3M |
| Mar 2026 | $3.1M | $6.6M | −$3.5M |
| Feb 2026 | $4.8M | $3.9M | $933K |
| Jan 2026 | $7.3M | $5.2M | $2.1M |
| Dec 2025 | $5.3M | $8.8M | −$3.6M |
| Nov 2025 | $2.8M | $4.9M | −$2.1M |
| Oct 2025 | $1.5M | $2.5M | −$988K |
| Sep 2025 | $3.6M | $5.5M | −$2.0M |
| Aug 2025 | $3.1M | $5.5M | −$2.4M |
| Jul 2025 | $5.2M | $6.5M | −$1.3M |
GWMZX Assets Under Management
Net assets of AMG GW&K Municipal Enhanced Yield Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $161.52M |
| 2026-03-31 | $156.57M |
| 2025-12-31 | $159.44M |
| 2025-09-30 | $164.64M |
| 2025-06-30 | $166.60M |
| 2025-03-31 | $181.63M |
| 2024-12-31 | $184.49M |
| 2024-09-30 | $208.20M |
| 2024-06-28 | $204.09M |
| 2024-03-28 | $209.75M |
| 2023-12-29 | $216.55M |
| 2023-09-29 | $231.64M |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.