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ANALYTICS
AnalysisScreenerGroups

Selection

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GWMIX

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Benchmark

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Peer Universe

Reference set for percentile ranks and factor bars

Fixed Income Funds · 2,838 total

ANALYTICS
AnalysisScreenerGroups

GWMIX

AMG GW&K Municipal Bond Fund

Expense Ratio
0.39%
AUM
$916M
Inception
6/30/2009
1Y Return
-2.7%29th %ilevs 2,838 asset-class peers
·

The fund invests at least 80% of net assets in municipal bonds exempt from federal income tax, with up to 100% potentially subject to the federal alternative minimum tax. It primarily holds investment grade bonds rated Baa or BBB or higher, while also considering unrated bonds of comparable quality. The fund maintains a dollar-weighted average maturity of 6 to 12 years and an average effective duration of +/- 25% of the Bloomberg 10-Year Municipal Bond Index, utilizing a bottom-up, research-driven selection process.

Time Series
–

Performance

NameCumulative ReturnAnn. ReturnAnn. VolSharpeMax DD
GWMIX
AMG GW&K Municipal Bond Fund
-2.7%-2.7%3.5%-1.88-7.8%
ⓘ Methodology

ETF performance based on market prices. Drag on chart to select period. Sharpe Ratio uses the one-month T-bill as the risk-free rate. From 10/7/2025 to 10/7/2026.

Trailing Returns

Name
YTD1D5D1M3M6M1Y2Y3Y5YMAX
GWMIX
AMG GW&K Municipal Bond Fund
-4.5%-0.6%0.0%-3.6%-6.0%-4.4%-2.7%-0.2%3.0%-0.1%3.1%
ⓘ Methodology

ETF performance based on market prices. Returns for periods greater than one year are annualized. As of 10/7/2026.

Annual Returns

Name
20092010201120122013201420152016201720182019202020212022202320242025YTD
GWMIX
AMG GW&K Municipal Bond Fund
5.3%*4.2%12.8%5.7%-2.0%7.8%4.1%-0.7%4.9%0.9%7.6%4.7%0.4%-7.4%6.0%0.0%5.5%-4.5%
ⓘ Methodology

* partial year — the series ran for only part of it (its first year, or the year it closed); the figure is the return over the part it did run. ETF performance based on market prices. As of 10/7/2026.

Correlation Matrix

Benchmark

Select a second series, or to correlate with the seven research factors.

Factor Regression

Name
Ann. αβ MKTβ SMBβ HMLβ RMWβ CMAβ UMDβ iHMLR²Obs
GWMIXUS
AMG GW&K Municipal Bond Fund
-2.1%0.09**0.00-0.040.010.06*-0.02-0.030.18226
ⓘ Methodology

ETF performance based on market prices. US factor set. Daily OLS of excess return (fund − T-bill) on factor spread returns over the selected date range, intersected with each series' history. Bold with * |t| ≥ 1.96, ** |t| ≥ 2.58. Cell shading tracks each loading's t-stat. Betas are returns-based — compare with the holdings-based factor scores below. Factor returns are long-short spread returns (© Ken French, Dartmouth). From 10/7/2025 to 8/31/2026.

SnapshotAs ofvsⓘ

Fund Profile

Fund Documents(opens the fund company’s site in a new tab)
Family
Registrant
Type
Mutual Fund
Asset Class
Fixed Income
Region
Peer Group Benchmark
Prospectus Benchmark
Bloomberg U.S. Municipal Bond Index
Peer Group
Fixed Income - Muni Intermediate/Long (569 peers)
1Y Peer Percentile
64
3Y Peer Percentile
51
Expense Ratio
0.39%
5Y Tax Drag
0.07%/yr
AUM
$916M
3Y Flow
+38.7%
Yield
3.27%
Inception
6/30/2009
Holdings (Reported)
263
Turnover
61%
Equity
0%
Derivatives
0%
Net Equity Exposure
0%
Strategy Summary

The fund invests at least 80% of net assets in municipal bonds exempt from federal income tax, with up to 100% potentially subject to the federal alternative minimum tax. It primarily holds investment grade bonds rated Baa or BBB or higher, while also considering unrated bonds of comparable quality. The fund maintains a dollar-weighted average maturity of 6 to 12 years and an average effective duration of +/- 25% of the Bloomberg 10-Year Municipal Bond Index, utilizing a bottom-up, research-driven selection process.

ⓘ Methodology

Expense ratio and its components from the fund's prospectus fee table; tax drag from its after-tax return table. Turnover from the SEC annual report (3/6/2026). Yield as of 10/6/2026, AUM 9/30/2026. Holdings, asset class, style, peer group and exposures as of 6/30/2026. Strategy summary from the fund's prospectus.

Factor DetailsRef: Fixed Income Funds

None of the selected metrics are scored for GWMIX — switch the picker to All, or add metrics under Metrics (top right).

ⓘ Methodology

Hover or click for factor definitions. Weighted average of underlying company-level values with weights equal to position size. Solid blue dots mark the fund's position within the clean equity fund universe (5th–95th percentile scale); the shaded band spans the fund's broad class (Fixed Income Funds) 25th–75th percentile, notched at the median. Holdings as of 6/30/2026. Stock-level data as of 8/31/2026. Expense ratio, yield, and turnover as of 10/6/2026. AUM as of 9/30/2026.

Country Exposure

Level
100.0%
100.0%
ⓘ Methodology

Shares are percentages of the holdings that carry a country, not portfolio weights. Based on N-PORT domicile; ADRs list under their exchange. Holdings as of 6/30/2026. Stock-level data as of 8/31/2026.

Holdings

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263 positions (top 10 shown, create for full holdings)

#NameWeight %Country
1Fixed Income Clearing
4.00
USA
2Southeast Energy Authority (AL)
1.48
USA
3Louisiana Stad & Exposition Dist
1.24
USA
4Illinois (IL), State OF
1.09
USA
5California Community Choice Financing Authority (CA)
1.07
USA
6New York Transportation Development Corp (NY)
1.07
USA
7Chicago (IL), City OF
1.04
USA
8State Board OF Administration Finance
1.04
USA
9Florida Dev Fin
1.02
USA
10Great Lakes WTR Auth Mich
1.02
USA
ⓘ Methodology

Sector, country and factor detail need a security match; the share of weight that matched is a member figure, so the rows without one appear here with those columns blank. Holdings as of 6/30/2026. Stock-level data as of 8/31/2026.

ConcentrationRef: Fixed Income Funds

Total Holdings263
Effective Holdings153
Top 10 Weight14.1%
Max Position4.0%
Top Sector (of Net Assets)103%
Top Country (of Net Assets)100%
ⓘ Methodology

Hover or click for definitions. Solid blue dots mark the fund: percentage rows on a 0–100% scale, holdings counts log-scaled across the clean-universe 5th–95th percentile range. The shaded band spans the fund's broad class (Fixed Income Funds) 25th–75th percentile, notched at the median. Holdings as of 6/30/2026.

Benchmark DifferentiationRef: Fixed Income Funds

vs AGGBroad Benchmark
Tracking Error4.4%
Benchmark Correlation0.58
ⓘ Methodology

One sub-card per benchmark: the market primary, then the style secondary — the gap between them is the style sleeve itself. Both anchors are Sparkline-inferred (market from asset class and region, style from the holdings size-and-style map), not the fund's official prospectus benchmark. Solid blue dot marks the fund; the shaded band spans the reference set's 25th–75th percentile, notched at the median (band follows the Peer Universe selector). Active Share compares the fund's book with the benchmark's, share for share; Tracking Error is the annualized daily deviation over the trailing two years (ruler runs to just past the universe's 95th percentile, or past the fund's own figure where that is larger); Benchmark Correlation is the plain daily correlation over the trailing year. Hover the labels for full definitions.

Peer Group Rank

See All Peer Groups
Metric
GWMIX
AMG GW&K Municipal Bond Fund
Peer Group
569 funds
Peer Asset Class
2,838 funds
YTD Return
-4.52%-4.42%47-2.33%18
1Y Return
-2.71%-3.14%64-1.51%29
3Y Return (Ann.)
3.04%3.02%514.80%16
5Y Return (Ann.)
-0.09%-0.57%730.27%43
Expense Ratiohigher = cheaper
0.39%0.56%650.52%63
ⓘ Methodology

Sparkline's own holdings-based peer taxonomy (1,325 share classes across 569 funds). One share class shown per fund — the exchange-listed class where the SEC series has one, else its longest-history class; percentile ranks and medians are computed against the same deduped set. Quartile chips fill the layer the fund's rank falls in (top layer = best quartile). Funds without a full return history rank only on the horizons they cover.

Similar Funds

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Nearest funds across the whole universe, by holdings and behavior — the peer taxonomy is ignored, so matches can come from any category.

Top Similarity34
Top Overlap
Top Active Tilt
Top Return Corr
FundPeer Group
1MESHX
AMG GW&K Municipal Enhanced SMA Shares
Fixed Income - Muni Intermediate/Long
Fixed Income - Muni Intermediate/Long
34---
2PMFAX
PIMCO Flexible Municipal Income Fund
Fixed Income - Muni Intermediate/Long
Fixed Income - Muni Intermediate/Long
33---
3HMOP
Hartford Municipal Opportunities ETF
Fixed Income - Muni Intermediate/Long
Fixed Income - Muni Intermediate/Long
18---
4PML
PIMCO MUNICIPAL INCOME FUND II
Fixed Income - Muni Intermediate/Long
Fixed Income - Muni Intermediate/Long
10---
5HHMAX
THE HARTFORD MUNICIPAL OPPORTUNITIES FUND
Fixed Income - Muni Intermediate/Long
Fixed Income - Muni Intermediate/Long
10---
6RTHAX
Tax-Exempt High Yield Bond Fund
Fixed Income - Muni High Yield
Fixed Income - Muni High Yield
10---
7PHMIX
PIMCO High Yield Municipal Bond Fund
Fixed Income - Muni High Yield
Fixed Income - Muni High Yield
10---
8AUNAX
AB Municipal Bond Inflation Strategy
Fixed Income - Muni Intermediate/Long
Fixed Income - Muni Intermediate/Long
10---
9SBTOX
Tax-Aware Overlay B Portfolio
Allocation - Conservative
Allocation - Conservative
6---
10MDFIX
Matisse Discounted Bond CEF Strategy
Fixed Income - Core
Fixed Income - Core
6---

The method columns are members-only — create a free account to see these figures.

ⓘ Methodology

Rows are the consensus top matches (a fund must place in at least two methods' top 250 to qualify, and matches missing more than one of this fund's own methods are not ranked — a row scored on fewer methods is a noisier estimate, not a better match). Click a method column to see that method's own top matches across the whole universe instead. Gray (N) beside each method's metric is that fund's rank in the whole universe on that method. Similarity is a percentile among match-grade fund pairs, 0–100 — 87 means the pair is closer than 87% of the strongest matches in the universe, averaged across the methods — so it compares across funds: index clones tie at the top with thousands of other clone pairs, so scores top out in the high 80s to 90s, while a one-of-a-kind fund's best match can score in the 30s. Rows are ordered by the Consensus Rank — the geometric mean of those universe ranks, shown in each cell's tooltip — and the score is held down the list to the level of the closest match above it, so equal scores mean equally close and the number reads as a floor. A dash means that method has no figure for the pair at all (one of them lacks the holdings or return history it needs). Hover a column header for each method's definition. The “Top…” strips above compare against every fund's own top match across the whole universe (they deliberately don't follow the Peer Universe selector); Top Similarity is simply the best match's score, with no reference band; the Holdings and Active Tilt strips carry no reference band because computing every fund's best book overlap would require a full holdings scan per fund — the dot stands alone on its natural 0–100% scale. One share class shown per fund, and a fund's own sister share classes are excluded from its Top-match strips. Holdings as of 6/30/2026. Consensus Rank is the geometric mean of the match's universe-wide rank across the methods (#1.0 = top match on every one). Holdings Overlap = common-holdings weight (sum of the minimum weight across shared positions, long only). Active Tilt Overlap = the same statistic on active weights (holdings minus the fund's own default benchmark, floored at 0), which strips the benchmark ballast that dominates raw overlap. Return Correlation = correlation of market-hedged daily returns over the trailing two years (CAPM residuals), so only market-beta co-movement is removed; requires ~18 months of daily history (378 of the window's 504 trading days).