MBDFX — AMG GW&K Core Bond Fund
Data updated: 2026-06-24
MBDFX — AMG GW&K Core Bond Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Total / Aggregate Bond · $102.53M AUM · 0.56% expense ratio · 4.3% 1-yr return. From SEC regulatory filings.
MBDFX Fund Overview
MBDFX — AMG GW&K Core Bond Fund is a US mutual fund managed by AMG Funds I, categorised as Long Total / Aggregate Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: AMG Funds I
- Category: Long Total / Aggregate Bond
- Assets under management: $102.53M
- 1-year return: 4.3%
- Ticker: MBDFX
- SEC CIK: 0000882443
- SEC series ID: S000009914
- Share class ID: C000027427
MBDFX Holdings
Top 10 holdings of AMG GW&K Core Bond Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| United States Of America - Bureau Of The Public Debt | 4.46% |
| United States Of America - Bureau Of The Public Debt | 3.98% |
| Federal National Mortgage Association | 2.40% |
| Federal National Mortgage Association | 2.02% |
| Mirae Asset Securities (usa) Inc. | 1.85% |
| United States Of America - Bureau Of The Public Debt | 1.75% |
| California (ca), State Of | 1.68% |
| Federal National Mortgage Association | 1.63% |
| Federal National Mortgage Association | 1.44% |
| Jobsohio Beverage System (oh) | 1.33% |
MBDFX Portfolio Allocation
Asset-class allocation of AMG GW&K Core Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 60.7% |
| Securitized | 38.3% |
| Cash & Equivalents | 2.1% |
MBDFX Performance
Total returns for MBDFX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -0.0% |
| 1 year | 4.3% |
| 3 years (annualised) | 3.3% |
| 5 years (annualised) | -0.1% |
MBDFX Risk Information
Risk metrics for MBDFX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.6%
MBDFX Costs and Fees
MBDFX costs about $56 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.56%
- Gross expense ratio: 0.69%
- Portfolio turnover: 28%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
MBDFX Cashflows
Over the 12 months to 2026-04, AMG GW&K Core Bond Fund had net outflows of $11.37M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-04 | −$853.38K |
| 2026-03 | −$1.18M |
| 2026-02 | −$479.81K |
| 2026-01 | −$1.34M |
| 2025-12 | −$330.67K |
| 2025-11 | −$2.00M |
MBDFX Debt Constituents
Largest debt holdings of AMG GW&K Core Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Of America - Bureau Of The Public Debt | 4.46% |
| United States Of America - Bureau Of The Public Debt | 3.98% |
| United States Of America - Bureau Of The Public Debt | 1.75% |
| California (ca), State Of | 1.68% |
| Jobsohio Beverage System (oh) | 1.33% |
| Aircastle Ltd. / Aircastle Ireland Dac | 1.02% |
| Commonspirit Health | 1.02% |
| Pnc Financial Services Group, Inc. (the) | 1.00% |
| Jacobs Engineering Group, Inc. | 1.00% |
| Cvs Health Corp. | 0.99% |
MBDFX Prospectus and SEC Filings
Official AMG GW&K Core Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Long Total / Aggregate Bond funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.