NBOS additions & removals
Changes are observation-bounded: an addition is the first retained official snapshot containing a security after an earlier absence; a removal is its first retained absence. Baseline holdings receive no invented addition date.
Additions
| Ticker | Issuer | Observed date | Change |
|---|
| State Street SPDR S&P 500 ETF Trust | State Street SPDR S&P 500 ETF Trust | 2026-02-28 | Added / first present |
|---|
| United States Treasury | United States Treasury | 2026-02-28 | Added / first present |
|---|
| United States Treasury | United States Treasury | 2025-11-30 | Added / first present |
|---|
| United States Treasury | United States Treasury | 2025-11-30 | Added / first present |
|---|
| State Street Global Advisors | State Street Global Advisors | 2025-05-31 | Added / first present |
|---|
| United States Treasury | United States Treasury | 2025-05-31 | Added / first present |
|---|
| SPDR S&P 500 ETF Trust | SPDR S&P 500 ETF Trust | 2025-02-28 | Added / first present |
|---|
| United States Treasury | United States Treasury | 2025-02-28 | Added / first present |
|---|
| United States Treasury | United States Treasury | 2024-11-30 | Added / first present |
|---|
Removals
| Ticker | Issuer | Observed date | Change |
|---|
| SPDR S&P 500 ETF Trust | SPDR S&P 500 ETF Trust | 2025-08-31 | Removed / first absent |
|---|
| State Street Global Advisors | State Street Global Advisors | 2025-02-28 | Removed / first absent |
|---|
| United States Treasury | United States Treasury | 2024-11-30 | Removed / first absent |
|---|
| United States Treasury | United States Treasury | 2025-02-28 | Removed / first absent |
|---|
| United States Treasury | United States Treasury | 2025-05-31 | Removed / first absent |
|---|
| United States Treasury | United States Treasury | 2025-08-31 | Removed / first absent |
|---|
| United States Treasury | United States Treasury | 2025-11-30 | Removed / first absent |
|---|
| United States Treasury | United States Treasury | 2026-02-28 | Removed / first absent |
|---|