MGBIX — AMG Managers Loomis Sayles Bond Fund
Data updated: 2026-06-01
MGBIX — AMG Managers Loomis Sayles Bond Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Corporate Bond · $322.11M AUM · 0.48% expense ratio · 4.3% 1-yr return. From SEC regulatory filings.
MGBIX Fund Overview
MGBIX — AMG Managers Loomis Sayles Bond Fund is a US mutual fund managed by Amg Funds III, categorised as Long Corporate 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 III
- Category: Long Corporate Bond
- Assets under management: $322.11M
- 1-year return: 4.3%
- Ticker: MGBIX
- SEC CIK: 0000720309
- SEC series ID: S000009868
- Share class ID: C000125498
MGBIX Holdings
Top 10 holdings of AMG Managers Loomis Sayles Bond Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| United States Treasury Bonds | 3.47% |
| United States Treasury Bonds | 2.56% |
| Federal National Mortgage Association | 2.18% |
| Federal National Mortgage Association | 1.93% |
| Federal National Mortgage Association | 1.89% |
| Federal National Mortgage Association | 1.79% |
| United States Treasury Bonds | 1.68% |
| Federal National Mortgage Association | 1.50% |
| Federal National Mortgage Association | 1.32% |
| Federal National Mortgage Association | 1.29% |
MGBIX Portfolio Allocation
Asset-class allocation of AMG Managers Loomis Sayles Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 66.9% |
| Securitized | 31.8% |
| Cash & Equivalents | 2.0% |
MGBIX Performance
Total returns for MGBIX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -0.4% |
| 1 year | 4.3% |
| 3 years (annualised) | 4.0% |
| 5 years (annualised) | 0.6% |
MGBIX Risk Information
Risk metrics for MGBIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.6%
MGBIX Costs and Fees
MGBIX costs about $48 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.48%
- Gross expense ratio: 0.52%
- Portfolio turnover: 35%
- Brokerage commissions: 0.00 bps of average net assets (SEC N-CEN)
MGBIX Cashflows
Over the 12 months to 2026-03, AMG Managers Loomis Sayles Bond Fund had net outflows of $43.76M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | −$3.39M |
| 2026-02 | −$3.35M |
| 2026-01 | −$1.26M |
| 2025-12 | −$4.98M |
| 2025-11 | −$3.53M |
| 2025-10 | −$3.78M |
MGBIX Debt Constituents
Largest debt holdings of AMG Managers Loomis Sayles Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury Bonds | 3.47% |
| United States Treasury Bonds | 2.56% |
| United States Treasury Bonds | 1.68% |
| United States Treasury Bonds | 1.19% |
| Jacobs Engineering Group Inc. | 1.02% |
| United States Treasury Bonds | 1.00% |
| Bank of America Corp. | 0.99% |
| California Health Facs Fing Auth | 0.99% |
| Jobsohio Beverage System (oh) | 0.95% |
| United States Treasury Bonds | 0.83% |
MGBIX Prospectus and SEC Filings
Official AMG Managers Loomis Sayles Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Long Corporate 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.