SMBS holdings

Computed by this site from the fund's SEC Form N-PORT filing; what the measure does not tell you · every fund in one table · hold it with other funds? X-ray the mix. Pricing: 1.68% at a quoted market price (level 1), one issuer country.

The largest line in SMBS's filing is not a stock but State Street Institutional US Government Money Market Fund, a short-term position at 1.67% of net assets. Ten companies are 4.35% of the fund; the other 4,187 share the rest. Among the 15 mortgage-backed funds measured here, SMBS behaves like 984.5 holdings against a median of 157.5 — 6.3 times the median. Across 7 quarterly filings SMBS has become less concentrated: it behaved like 120.1 at 2024-11-30 and 984.5 at 2026-05-31. Between the 2026-02-28 and 2026-05-31 filings 129 positions were added and 4 dropped; 9.0% of the weight moved.

Each sentence is read from the fund's own SEC filing; the class median is computed across the comparable mortgage-backed funds on this site. Nothing here is a view on the fund.

Between 2024-11-30 and 2026-05-31, SMBS went from behaving like 120.1 equally weighted positions to 984.5 — 720% more, while its top ten went from 18.63% to 4.35% of net assets. Read across the funds on the concentration-over-time table.

One row per filed reporting period, newest first, read from EDGAR. Quarterly because that is the public filing cadence. Rows marked * are published but held out of the comparison above; the methodology page says when and why.

The 15 largest of 4,197 positions in SMBS's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: SMBS.csv.gz.

Monthly total returns from Item B.5 of SMBS's own filings, 19 months on record. Not computed here and not from a price feed.

Cross-checked against a series computed separately from prices: median difference — percentage points over 0 months, which is roughly the distributions. Every month with the filing it came from: SMBS.json · all funds.

4,072 positions became 4,197: 129 added (6.6% of the fund at the later date), 4 dropped (0.3% at the earlier date). Half the sum of all weight changes, a turnover proxy: 9.0%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of SMBS compared this way, as a feed: changes.xml · all funds: filings received.

New: Freddie Mac (0.29%), Freddie Mac (0.25%), Freddie Mac (0.22%), Freddie Mac (0.20%), Freddie Mac (0.18%), Freddie Mac (0.17%). Gone: Freddie Mac (0.13%), Freddie Mac (0.07%), Freddie Mac (0.04%), Fannie Mae (0.01%).

98.32% mortgage-backed, 1.68% short-term investment as filed; 1.7% carried at a quoted market price (fair-value level 1). Categories and levels are the filer's; what a low level-1 share does and does not mean is in the measure's page.

Every measured mortgage-backed fund lined up by how many holdings it behaves like; these sit either side of SMBS (984.5). Same filings, same arithmetic. Position in this list says nothing about which fund is better.