MOPBX — MainStay MacKay Common Stock Fund
Data updated: 2026-06-25
MOPBX — MainStay MacKay Common Stock Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. United States Mid Cap Blend / Core Equity · $364.28M AUM · 1.92% expense ratio · 13.8% 1-yr return. From SEC regulatory filings.
MOPBX Fund Overview
MOPBX — MainStay MacKay Common Stock Fund is a US mutual fund managed by New York Life Investments Funds, categorised as United States Mid Cap Blend / Core Equity. 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: United States Mid Cap Blend / Core Equity
- Assets under management: $364.28M
- 1-year return: 13.8%
- Ticker: MOPBX
- SEC CIK: 0000787441
- SEC series ID: S000006903
- Share class ID: C000018720
MOPBX Holdings
Top 10 holdings of MainStay MacKay Common Stock Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Linde plc | 5.42% |
| PACCAR, Inc. | 5.35% |
| M&T Bank Corp. | 5.12% |
| NVR, Inc. | 4.81% |
| Constellation Software, Inc. | 4.79% |
| Progressive Corp. (The) | 4.78% |
| Amphenol Corp. | 4.74% |
| Credit Acceptance Corp. | 4.62% |
| Old Dominion Freight Line, Inc. | 4.41% |
| Expeditors International of Washington, Inc. | 4.30% |
MOPBX Portfolio Allocation
Asset-class allocation of MainStay MacKay Common Stock Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 98.4% |
| Cash & Equivalents | 3.8% |
MOPBX Performance
Total returns for MOPBX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| 1 year | 13.8% |
| 3 years (annualised) | 7.4% |
| 5 years (annualised) | 12.2% |
MOPBX Risk Information
Risk metrics for MOPBX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 18.5%
MOPBX Costs and Fees
MOPBX costs about $192 per $10,000 invested per year in fund expenses.
- Net expense ratio: 1.92%
- Gross expense ratio: 1.92%
- Portfolio turnover: 15%
- Brokerage commissions: 0.35 bps of average net assets (SEC N-CEN)
MOPBX Cashflows
Over the 12 months to 2026-04, MainStay MacKay Common Stock Fund had net outflows of $117.64M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-04 | −$11.27M |
| 2026-03 | −$21.67M |
| 2026-02 | −$39.03M |
| 2026-01 | −$60.86M |
| 2025-12 | $5.63M |
| 2025-11 | −$10.41M |
MOPBX Debt Constituents
No individual debt constituents are reported in MainStay MacKay Common Stock Fund's latest SEC N-PORT filing.
MOPBX Prospectus and SEC Filings
Official MainStay MacKay Common Stock Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other United States Mid Cap Blend / Core Equity 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.