LMSMX — Western Asset SMASh Series M Fund
Data updated: 2026-07-22
LMSMX — Western Asset SMASh Series M Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Securitized (MBS/ABS/CMBS) Bond · $358.88M AUM · 0.00% expense ratio · 8.3% 1-yr return. From SEC regulatory filings.
LMSMX Fund Overview
LMSMX — Western Asset SMASh Series M Fund is a US mutual fund managed by Legg Mason Partners Institutional Trust, categorised as Long Securitized (MBS/ABS/CMBS) Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Legg Mason Partners Institutional Trust
- Category: Long Securitized (MBS/ABS/CMBS) Bond
- Assets under management: $358.88M
- 1-year return: 8.3%
- Ticker: LMSMX
- SEC CIK: 0000889512
- SEC series ID: S000014681
- Share class ID: C000040179
LMSMX Holdings
Top 10 holdings of Western Asset SMASh Series M Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Federal National Mortgage Association | 7.53% |
| United States Of America - Bureau Of The Public Debt | 7.17% |
| Government National Mortgage Association | 6.79% |
| Government National Mortgage Association | 5.10% |
| Federal National Mortgage Association | 4.21% |
| Government National Mortgage Association | 4.02% |
| Federal National Mortgage Association | 3.34% |
| United States Of America - Bureau Of The Public Debt | 3.33% |
| Bx Trust 2021-Pac | 3.23% |
| Government National Mortgage Association | 3.19% |
LMSMX Portfolio Allocation
Asset-class allocation of Western Asset SMASh Series M Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Securitized | 125.0% |
| Fixed Income | 10.5% |
| Derivatives | 0.9% |
LMSMX Performance
Total returns for LMSMX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.2% |
| 1 year | 8.3% |
| 3 years (annualised) | 4.6% |
| 5 years (annualised) | -2.1% |
LMSMX Risk Information
Risk metrics for LMSMX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 5.0%
LMSMX Costs and Fees
LMSMX costs about $0 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.00%
- Gross expense ratio: 0.06%
- Portfolio turnover: 372%
- Brokerage commissions: 1.42 bps of average net assets (SEC N-CEN)
LMSMX Cashflows
Over the 12 months to 2026-02, Western Asset SMASh Series M Fund had net outflows of $144.96M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-02 | −$4.75M |
| 2026-01 | −$2.46M |
| 2025-12 | −$8.96M |
| 2025-11 | −$7.40M |
| 2025-10 | −$7.65M |
| 2025-09 | −$8.90M |
LMSMX Debt Constituents
Largest debt holdings of Western Asset SMASh Series M Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Of America - Bureau Of The Public Debt | 7.17% |
| United States Of America - Bureau Of The Public Debt | 3.33% |
LMSMX Prospectus and SEC Filings
Official Western Asset SMASh Series M Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Long Securitized (MBS/ABS/CMBS) 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.