Long-Term US Government Bond Portfolio
Data updated: 2026-05-27
C000050282 — Long-Term US Government Bond Portfolio data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Treasury / Sovereign Bond · $120.53M AUM · 2.45% expense ratio · 0.5% 1-yr return. From SEC regulatory filings.
C000050282 Fund Overview
Long-Term US Government Bond Portfolio is a US mutual fund managed by Northwestern Mutual Series Fund INC, categorised as Long Treasury / Sovereign Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Northwestern Mutual Series Fund INC
- Category: Long Treasury / Sovereign Bond
- Assets under management: $120.53M
- 1-year return: 0.5%
- SEC CIK: 0000742212
- SEC series ID: S000018234
- Share class ID: C000050282
C000050282 Holdings
Top 10 holdings of Long-Term US Government Bond Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| United States Treasury | 21.15% |
| United States Treasury | 12.85% |
| United States Treasury | 11.28% |
| United States Treasury | 8.63% |
| United States Treasury | 6.58% |
| United States Treasury | 6.34% |
| United States Treasury | 6.24% |
| Umbs, Tba | 5.74% |
| United States Treasury | 5.24% |
| United States Treasury | 2.73% |
C000050282 Portfolio Allocation
Asset-class allocation of Long-Term US Government Bond Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 133.2% |
| Securitized | 21.7% |
| Real Estate | 2.1% |
| Cash & Equivalents | 0.8% |
C000050282 Performance
Total returns for C000050282 (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -0.3% |
| 1 year | 0.5% |
| 3 years (annualised) | -1.2% |
| 5 years (annualised) | -4.6% |
C000050282 Risk Information
Risk metrics for C000050282, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 8.4%
C000050282 Costs and Fees
C000050282 costs about $245 per $10,000 invested per year in fund expenses.
- Net expense ratio: 2.45%
- Gross expense ratio: 2.50%
- Portfolio turnover: 14%
- Brokerage commissions: 0.50 bps of average net assets (SEC N-CEN)
C000050282 Cashflows
Over the 12 months to 2026-03, Long-Term US Government Bond Portfolio had net inflows of $3.51M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | −$1.15M |
| 2026-02 | −$231.75K |
| 2026-01 | $779.81K |
| 2025-12 | −$2.73M |
| 2025-11 | −$1.22M |
| 2025-10 | $2.96M |
C000050282 Debt Constituents
Largest debt holdings of Long-Term US Government Bond Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury | 21.15% |
| United States Treasury | 12.85% |
| United States Treasury | 11.28% |
| United States Treasury | 8.63% |
| United States Treasury | 6.58% |
| United States Treasury | 6.34% |
| United States Treasury | 6.24% |
| United States Treasury | 5.24% |
| United States Treasury | 2.73% |
| United States Treasury | 2.65% |
C000050282 Prospectus and SEC Filings
Official Long-Term US Government Bond Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Long Treasury / Sovereign 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.