XBTY 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 |
|---|
| Treasury Bill | Treasury Bill | 2026-03-31 | Added / first present |
|---|
| Treasury Bill | Treasury Bill | 2026-03-31 | Added / first present |
|---|
| BIT1498P | The Options Clearing Corporation | 2026-03-31 | Added / first present |
|---|
| BIT1313P | The Options Clearing Corporation | 2026-03-31 | Added / first present |
|---|
| BIT1293P | The Options Clearing Corporation | 2026-03-31 | Added / first present |
|---|
| BIT1398P | The Options Clearing Corporation | 2026-03-31 | Added / first present |
|---|
| BIT1511P | The Options Clearing Corporation | 2026-03-31 | Added / first present |
|---|
| BIT1398O | The Options Clearing Corporation | 2026-03-31 | Added / first present |
|---|
| BIT1419P | The Options Clearing Corporation | 2026-03-31 | Added / first present |
|---|
| BIT1619P | The Options Clearing Corporation | 2026-03-31 | Added / first present |
|---|
| Treasury Bill | Treasury Bill | 2025-12-31 | Added / first present |
|---|
| Treasury Bill | Treasury Bill | 2025-12-31 | Added / first present |
|---|
| BIT2497P | The Options Clearing Corporation | 2025-12-31 | Added / first present |
|---|
| BIT2478P | The Options Clearing Corporation | 2025-12-31 | Added / first present |
|---|
| BIT2504P | The Options Clearing Corporation | 2025-12-31 | Added / first present |
|---|
| BIT2782P | The Options Clearing Corporation | 2025-12-31 | Added / first present |
|---|
| BIT2753P | The Options Clearing Corporation | 2025-12-31 | Added / first present |
|---|
| BIT2774P | The Options Clearing Corporation | 2025-12-31 | Added / first present |
|---|
| Treasury Bill | Treasury Bill | 2025-09-30 | Added / first present |
|---|
| Treasury Bill | Treasury Bill | 2025-09-30 | Added / first present |
|---|
| Treasury Bill | Treasury Bill | 2025-09-30 | Added / first present |
|---|
| BIT4512P | The Options Clearing Corporation | 2025-09-30 | Added / first present |
|---|
| BIT5013P | The Options Clearing Corporation | 2025-09-30 | Added / first present |
|---|
Removals
| Ticker | Issuer | Observed date | Change |
|---|
| Treasury Bill | Treasury Bill | 2026-03-31 | Removed / first absent |
|---|
| Treasury Bill | Treasury Bill | 2026-03-31 | Removed / first absent |
|---|
| BIT2497P | The Options Clearing Corporation | 2026-03-31 | Removed / first absent |
|---|
| BIT2478P | The Options Clearing Corporation | 2026-03-31 | Removed / first absent |
|---|
| BIT2504P | The Options Clearing Corporation | 2026-03-31 | Removed / first absent |
|---|
| BIT2782P | The Options Clearing Corporation | 2026-03-31 | Removed / first absent |
|---|
| BIT2753P | The Options Clearing Corporation | 2026-03-31 | Removed / first absent |
|---|
| BIT2774P | The Options Clearing Corporation | 2026-03-31 | Removed / first absent |
|---|
| Treasury Bill | Treasury Bill | 2025-12-31 | Removed / first absent |
|---|
| Treasury Bill | Treasury Bill | 2025-12-31 | Removed / first absent |
|---|
| Treasury Bill | Treasury Bill | 2025-12-31 | Removed / first absent |
|---|
| BIT4512P | The Options Clearing Corporation | 2025-12-31 | Removed / first absent |
|---|
| BIT5013P | The Options Clearing Corporation | 2025-12-31 | Removed / first absent |
|---|
| Treasury Bill | Treasury Bill | 2025-09-30 | Removed / first absent |
|---|
| BIT4870P | The Options Clearing Corporation | 2025-09-30 | Removed / first absent |
|---|
| BIT4795P | The Options Clearing Corporation | 2025-09-30 | Removed / first absent |
|---|
| BIT5328P | The Options Clearing Corporation | 2025-09-30 | Removed / first absent |
|---|
| BIT5411P | The Options Clearing Corporation | 2025-09-30 | Removed / first absent |
|---|