PBIMX — Bond Market Index Fund
Data updated: 2026-07-24
PBIMX — Bond Market Index Fund. Long Total / Aggregate Bond · $2.96B AUM · 1.02% expense ratio. Holdings, fees, performance and SEC filings.
PBIMX Fund Overview
PBIMX — Bond Market Index Fund is a US mutual fund managed by Principal Funds, Inc., 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: Principal Funds, Inc.
- Category: Long Total / Aggregate Bond
- Assets under management: $2.96B
- 1-year return: 4.7%
- Ticker: PBIMX
- SEC CIK: 0000898745
- SEC series ID: S000027178
- Share class ID: C000082027
PBIMX Investment Objective and Strategy
Bond Market Index Fund describes its objective and strategy as follows, from its latest prospectus filed with the SEC by Principal Funds, Inc..
Investment objective
The Fund seeks to provide current income.
Principal investment strategy
"Under normal circumstances, the Fund uses a passive investment approach known as ""sampling"" to invest at least 80% of its net assets, plus any borrowings for investment purposes, in investments designed to track the Bloomberg Barclays U.S. Aggregate Bond Index (the ""Index"") at the time of purchase. The Index is composed of investment grade, fixed rate debt issues with maturities of one year or more, including government securities, corporate securities, and asset-backed and mortgage-backed securities (securitized products). The Index is rebalanced monthly to reflect securities that have dropped out of or entered the Index in the preceding month. Because of the practical difficulties and expense of purchasing all of the securities in the Index, the Fund does not purchase all of the securities in the Index.
Instead, the Fund uses a sampling methodology to purchase securities with generally the same risk and return characteristics of the Index. Under normal circumstances, the Fund maintains an average portfolio duration that is in line with the duration of the Index, which as of August 31, 2017 was 5.93 years. The Fund will not concentrate (invest more than 25% of its assets) its investments in a particular industry except to the extent the Index is so concentrated. Because the Fund's portfolio turnover rate during the most recent fiscal year was more than 100%, the Fund is considered actively traded."
PBIMX Holdings
Top 10 holdings of Bond Market Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Principal Funds, Inc - Government Money Market Fund - Class R-6 | 2.39% |
| United States Treasury Note/Bond | 0.88% |
| iShares iBoxx USD Investment Grade Corporate Bond ETF | 0.59% |
| United States Treasury Note/Bond | 0.59% |
| United States Treasury Note/Bond | 0.58% |
| United States Treasury Note/Bond | 0.57% |
| United States Treasury Note/Bond | 0.46% |
| United States Treasury Note/Bond | 0.46% |
| United States Treasury Note/Bond | 0.45% |
| United States Treasury Note/Bond | 0.44% |
PBIMX Portfolio Allocation
Asset-class allocation of Bond Market Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 72.8% |
| Securitized | 24.5% |
| Cash & Equivalents | 2.5% |
| Equity | 0.6% |
PBIMX Performance
Total returns for PBIMX (as of 2026-10-01), from SEC filings.
| Period | Total return |
|---|---|
| 1 year | 4.7% |
| 3 years (annualised) | -3.3% |
| 5 years (annualised) | -1.2% |
PBIMX Risk Information
Risk metrics for PBIMX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 6.6%
PBIMX Costs and Fees
PBIMX costs about $102 per $10,000 invested per year in fund expenses.
- Net expense ratio: 1.02%
- Gross expense ratio: 1.04%
- Portfolio turnover: 43%
- Brokerage commissions: 0.01 bps of average net assets (SEC N-CEN)
PBIMX Cashflows
Over the 12 months to 2026-05, Bond Market Index Fund had net inflows of $302.90M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-05 | $26.33M |
| 2026-04 | $109.68M |
| 2026-03 | $18.41M |
| 2026-02 | $36.85M |
| 2026-01 | $13.97M |
| 2025-12 | $132.95M |
PBIMX Debt Constituents
Largest debt holdings of Bond Market Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury Note/Bond | 0.88% |
| United States Treasury Note/Bond | 0.59% |
| United States Treasury Note/Bond | 0.58% |
| United States Treasury Note/Bond | 0.57% |
| United States Treasury Note/Bond | 0.46% |
| United States Treasury Note/Bond | 0.46% |
| United States Treasury Note/Bond | 0.45% |
| United States Treasury Note/Bond | 0.44% |
| United States Treasury Note/Bond | 0.43% |
| United States Treasury Note/Bond | 0.42% |
PBIMX Prospectus and SEC Filings
Official Bond Market Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2025-12-23
- Prospectus (485BPOS) — filed 2024-12-27
- Prospectus (485BPOS) — filed 2023-12-27
- Portfolio holdings (N-PORT) — filed 2026-07-24
- Portfolio holdings (N-PORT) — filed 2026-04-24
- Portfolio holdings (N-PORT) — filed 2026-01-23
- Annual census (N-CEN) — filed 2025-11-14
- Annual census (N-CEN) — filed 2023-11-13
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.