XIDE 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 |
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| Dreyfus Government Cash Management Funds | Dreyfus Government Cash Management Funds | 2026-02-28 | Added / first present |
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| United States Treasury Bills | United States Treasury Bills | 2026-02-28 | Added / first present |
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| United States Treasury Bills | United States Treasury Bills | 2026-02-28 | Added / first present |
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| United States Treasury Bills | United States Treasury Bills | 2026-02-28 | Added / first present |
|---|
| United States Treasury Bills | United States Treasury Bills | 2026-02-28 | Added / first present |
|---|
| United States Treasury Bills | United States Treasury Bills | 2026-02-28 | Added / first present |
|---|
| United States Treasury Bills | United States Treasury Bills | 2026-02-28 | Added / first present |
|---|
| United States Treasury Bills | United States Treasury Bills | 2026-02-28 | Added / first present |
|---|
| United States Treasury Bills | United States Treasury Bills | 2026-02-28 | Added / first present |
|---|
| United States Treasury Bills | United States Treasury Bills | 2026-02-28 | Added / first present |
|---|
| SPY 12 C0.07 | CBOE GLOBAL MARKETS, INC. | 2026-02-28 | Added / first present |
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| SPY 12 P680.58 | CBOE GLOBAL MARKETS, INC. | 2026-02-28 | Added / first present |
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| SPY 12 P612.52 | CBOE GLOBAL MARKETS, INC. | 2026-02-28 | Added / first present |
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| SPY 12 C680.58 | CBOE GLOBAL MARKETS, INC. | 2026-02-28 | Added / first present |
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| TREASURY BILL | TREASURY BILL | 2025-02-28 | Added / first present |
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| TREASURY BILL | TREASURY BILL | 2025-02-28 | Added / first present |
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| TREASURY BILL | TREASURY BILL | 2025-02-28 | Added / first present |
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| TREASURY BILL | TREASURY BILL | 2025-02-28 | Added / first present |
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| TREASURY BILL | TREASURY BILL | 2025-02-28 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-02-28 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-02-28 | Added / first present |
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| TREASURY BILL | TREASURY BILL | 2025-02-28 | Added / first present |
|---|
| TREASURY BILL | TREASURY BILL | 2025-02-28 | Added / first present |
|---|
| SPY 12 C0.06 | CBOE GLOBAL MARKETS, INC. | 2025-02-28 | Added / first present |
|---|
| SPY 12 P591.14 | CBOE GLOBAL MARKETS, INC. | 2025-02-28 | Added / first present |
|---|
| SPY 12 P532.03 | CBOE GLOBAL MARKETS, INC. | 2025-02-28 | Added / first present |
|---|
| SPY 12 C591.14 | CBOE GLOBAL MARKETS, INC. | 2025-02-28 | Added / first present |
|---|
Removals
| Ticker | Issuer | Observed date | Change |
|---|
| TREASURY BILL | TREASURY BILL | 2025-08-31 | Removed / first absent |
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| TREASURY BILL | TREASURY BILL | 2025-08-31 | Removed / first absent |
|---|
| TREASURY BILL | TREASURY BILL | 2025-08-31 | Removed / first absent |
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| TREASURY BILL | TREASURY BILL | 2025-11-30 | Removed / first absent |
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| TREASURY BILL | TREASURY BILL | 2025-05-31 | Removed / first absent |
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| TREASURY BILL | TREASURY BILL | 2025-05-31 | Removed / first absent |
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| TREASURY BILL | TREASURY BILL | 2025-05-31 | Removed / first absent |
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| TREASURY BILL | TREASURY BILL | 2025-11-30 | Removed / first absent |
|---|
| TREASURY BILL | TREASURY BILL | 2025-11-30 | Removed / first absent |
|---|
| SPY 12 C0.06 | CBOE GLOBAL MARKETS, INC. | 2026-02-28 | Removed / first absent |
|---|
| SPY 12 P591.14 | CBOE GLOBAL MARKETS, INC. | 2026-02-28 | Removed / first absent |
|---|
| SPY 12 P532.03 | CBOE GLOBAL MARKETS, INC. | 2026-02-28 | Removed / first absent |
|---|
| SPY 12 C591.14 | CBOE GLOBAL MARKETS, INC. | 2026-02-28 | Removed / first absent |
|---|
| MISXX | Dreyfus Government Cash Management | 2026-02-28 | Removed / first absent |
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| TREASURY BILL | TREASURY BILL | 2024-11-30 | Removed / first absent |
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| TREASURY BILL | TREASURY BILL | 2024-11-30 | Removed / first absent |
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| TREASURY BILL | TREASURY BILL | 2024-11-30 | Removed / first absent |
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| SPY 12 C0.05 | CBOE GLOBAL MARKETS, INC. | 2025-02-28 | Removed / first absent |
|---|
| SPY 12 P469.36 | CBOE GLOBAL MARKETS, INC. | 2025-02-28 | Removed / first absent |
|---|
| SPY 12 P422.43 | CBOE GLOBAL MARKETS, INC. | 2025-02-28 | Removed / first absent |
|---|
| SPY 12 C469.36 | CBOE GLOBAL MARKETS, INC. | 2025-02-28 | Removed / first absent |
|---|