ISTB 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: 1.56% at a quoted market price (level 1), 70 issuer countries.

ISTB's largest investment is U.S. Treasury Notes at 0.99% of net assets. U.S. Treasury Notes and U.S. Treasury Notes follow; the three together are 2.93%. Ten companies are 8.76% of the fund; the other 7,395 share the rest. Among the 192 bond funds measured here, ISTB behaves like 365.2 holdings against a median of 236.4 — 1.5 times the median. Across 27 quarterly filings ISTB has become less concentrated: it behaved like 231 at 2019-10-31 and 351 at 2026-04-30. Between the 2026-01-31 and 2026-04-30 filings 641 positions were added and 605 dropped; 10.1% of the weight moved. the United States is the largest country at 82.82% of the portfolio, across 70 countries in the filing.

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

Between 2019-10-31 and 2026-04-30, ISTB went from behaving like 231 equally weighted positions to 351 — 52% more, while its top ten went from 14.45% to 8.92% 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 7,405 positions in ISTB's Form N-PORT, weight as a share of net assets, securities-lending collateral excluded. Every position, every quarter: listed with the point-in-time files, available on request.

Share of ISTB's own investments by the issuer country the filer reported (incorporation, not revenue). Each country links to every fund that holds it.

Monthly total returns from Item B.5 of ISTB's own filings, 81 months on record. Not computed here and not from a price feed.

Cross-checked against a series computed separately from prices: median difference 0.03 percentage points over 81 months, which is roughly the distributions. Every month with the filing it came from: ISTB.json · all funds.

The fund lends its holdings, and Item B.4.a of the filing names every firm holding them. At 2026-07-31, $20m was out to 17 borrowers. The largest, BARCLAYS BANK PLC, held 21.4% of it.

The filing reports no cash collateral position against this loan. Collateral taken in a form the fund does not hold as a position does not appear in N-PORT, so this is silence rather than absence. What the collateral figure can and cannot show. Every quarter ISTB has filed, with each borrower: ISTB.json · all funds.

7,016 positions became 7,052: 641 added (7.3% of the fund at the later date), 605 dropped (8.8% at the earlier date). Half the sum of all weight changes, a turnover proxy: 10.1%. Positions are matched on identifiers, so a security whose identifier changed shows as one drop and one add. Every filing of ISTB compared this way, as a feed: changes.xml · all funds: filings received.

New: United States Treasury (0.89%), United States Treasury (0.54%), United States Treasury (0.51%), United States Treasury (0.46%), United States Treasury (0.33%), United States Treasury (0.26%). Gone: United States Treasury (0.64%), United States Treasury (0.54%), United States Treasury (0.51%), United States Treasury (0.50%), United States Treasury (0.46%), United States Treasury (0.43%).

1.6% of ISTB is carried at a quoted market price (fair-value level 1); 0.0% at level 3, priced from the filer's own inputs. Categories and levels are the filer's, from Form N-PORT; what a low level-1 share does and does not mean is in the measure's page.

Every measured debt fund lined up by how many holdings it behaves like; these sit either side of ISTB (365.2). Same filings, same arithmetic. Position in this list says nothing about which fund is better.