MTBAX — MainStay MacKay Tax Free Bond Fund
Data updated: 2026-06-25
MTBAX — MainStay MacKay Tax Free Bond Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Municipal - National Bond · $9.38B AUM · 0.74% expense ratio · 6.4% 1-yr return. From SEC regulatory filings.
MTBAX Fund Overview
MTBAX — MainStay MacKay Tax Free Bond Fund is a US mutual fund managed by New York Life Investments Funds, categorised as Long Municipal - National Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: New York Life Investments Funds
- Category: Long Municipal - National Bond
- Assets under management: $9.38B
- 1-year return: 6.4%
- Ticker: MTBAX
- SEC CIK: 0000787441
- SEC series ID: S000006898
- Share class ID: C000018700
MTBAX Holdings
Top 10 holdings of MainStay MacKay Tax Free Bond Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Chicago Board of Education Dedicated Capital Improvement Tax | 0.69% |
| Energy Southeast A Cooperative District | 0.69% |
| Minnesota Municipal Gas Agency | 0.68% |
| California Community Choice Financing Authority | 0.67% |
| New Hampshire Business Finance Authority | 0.65% |
| Los Angeles Department of Water & Power | 0.55% |
| San Francisco City & County Airport Commission | 0.53% |
| Southeast Energy Authority A Cooperative District | 0.51% |
| Oklahoma Turnpike Authority | 0.50% |
| Pennsylvania Economic Development Financing Authority | 0.50% |
MTBAX Portfolio Allocation
Asset-class allocation of MainStay MacKay Tax Free Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 97.0% |
| Cash & Equivalents | 2.3% |
MTBAX Performance
Total returns for MTBAX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.2% |
| 1 year | 6.4% |
| 3 years (annualised) | 3.4% |
| 5 years (annualised) | 0.6% |
MTBAX Risk Information
Risk metrics for MTBAX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 4.1%
MTBAX Costs and Fees
MTBAX costs about $74 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.74%
- Gross expense ratio: 0.74%
- Portfolio turnover: 54%
- Brokerage commissions: 0.03 bps of average net assets (SEC N-CEN)
MTBAX Cashflows
Over the 12 months to 2026-04, MainStay MacKay Tax Free Bond Fund had net inflows of $266.19M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-04 | −$29.73M |
| 2026-03 | $61.24M |
| 2026-02 | $100.51M |
| 2026-01 | $192.46M |
| 2025-12 | $1.80M |
| 2025-11 | $50.94M |
MTBAX Debt Constituents
Largest debt holdings of MainStay MacKay Tax Free Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Chicago Board of Education Dedicated Capital Improvement Tax | 0.69% |
| Energy Southeast A Cooperative District | 0.69% |
| Minnesota Municipal Gas Agency | 0.68% |
| California Community Choice Financing Authority | 0.67% |
| New Hampshire Business Finance Authority | 0.65% |
| Los Angeles Department of Water & Power | 0.55% |
| San Francisco City & County Airport Commission | 0.53% |
| Southeast Energy Authority A Cooperative District | 0.51% |
| Oklahoma Turnpike Authority | 0.50% |
| Pennsylvania Economic Development Financing Authority | 0.50% |
MTBAX Prospectus and SEC Filings
Official MainStay MacKay Tax Free Bond Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Long Municipal - National 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.