NYM 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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| City of New York NY | City of New York NY | 2026-02-28 | Added / first present |
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| Metropolitan Transportation Authority | Metropolitan Transportation Authority | 2026-02-28 | Added / first present |
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| City of New York NY | City of New York NY | 2026-02-28 | Added / first present |
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| Main Street Natural Gas Inc | Main Street Natural Gas Inc | 2026-02-28 | Added / first present |
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| New York State Dormitory Authority | New York State Dormitory Authority | 2026-02-28 | Added / first present |
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| Puerto Rico Industrial Tourist Educational Medical & Envirml Ctl Facs Fing Auth | Puerto Rico Industrial Tourist Educational Medical & Envirml Ctl Facs Fing Auth | 2026-02-28 | Added / first present |
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| City of New York NY | City of New York NY | 2026-02-28 | Added / first present |
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| City of New York NY | City of New York NY | 2026-02-28 | Added / first present |
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| Main Street Natural Gas Inc | Main Street Natural Gas Inc | 2026-02-28 | Added / first present |
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| New York State Dormitory Authority | New York State Dormitory Authority | 2026-02-28 | Added / first present |
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| Town of Tonawanda NY | Town of Tonawanda NY | 2026-02-28 | Added / first present |
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| County of Suffolk NY | County of Suffolk NY | 2026-02-28 | Added / first present |
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| Tennessee Energy Acquisition Corp | Tennessee Energy Acquisition Corp | 2026-02-28 | Added / first present |
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| Black Belt Energy Gas District | Black Belt Energy Gas District | 2026-02-28 | Added / first present |
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| Build NYC Resource Corp | Build NYC Resource Corp | 2026-02-28 | Added / first present |
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| Build NYC Resource Corp | Build NYC Resource Corp | 2026-02-28 | Added / first present |
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| Build NYC Resource Corp | Build NYC Resource Corp | 2026-02-28 | Added / first present |
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| New York City Transitional Finance Authority Future Tax Secured Revenue | New York City Transitional Finance Authority Future Tax Secured Revenue | 2026-02-28 | Added / first present |
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| City of New York NY | City of New York NY | 2026-02-28 | Added / first present |
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| Triborough Bridge & Tunnel Authority | Triborough Bridge & Tunnel Authority | 2026-02-28 | Added / first present |
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| New York City Transitional Finance Authority Future Tax Secured Revenue | New York City Transitional Finance Authority Future Tax Secured Revenue | 2026-02-28 | Added / first present |
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| Build NYC Resource Corp | Build NYC Resource Corp | 2026-02-28 | Added / first present |
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| New York State Dormitory Authority | New York State Dormitory Authority | 2026-02-28 | Added / first present |
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| Town of Oyster Bay NY | Town of Oyster Bay NY | 2026-02-28 | Added / first present |
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| Build NYC Resource Corp | Build NYC Resource Corp | 2026-02-28 | Added / first present |
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| New York State Dormitory Authority | New York State Dormitory Authority | 2026-02-28 | Added / first present |
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Removals
| Ticker | Issuer | Observed date | Change |
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| Fannie Mae - CAS | Fannie Mae - CAS | 2026-02-28 | Removed / first absent |
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| Niagara Area Development Corp | Niagara Area Development Corp | 2026-02-28 | Removed / first absent |
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| Utility Debt Securitization Authority | Utility Debt Securitization Authority | 2026-02-28 | Removed / first absent |
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| Sparks Tourism Improvement District No 1 | Sparks Tourism Improvement District No 1 | 2026-02-28 | Removed / first absent |
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| City of New York NY | City of New York NY | 2026-02-28 | Removed / first absent |
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| Metropolitan Transportation Authority | Metropolitan Transportation Authority | 2026-02-28 | Removed / first absent |
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| City of New York NY | City of New York NY | 2026-02-28 | Removed / first absent |
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| New York City Municipal Water Finance Authority | New York City Municipal Water Finance Authority | 2026-02-28 | Removed / first absent |
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| New York City Health and Hospitals Corp | New York City Health and Hospitals Corp | 2026-02-28 | Removed / first absent |
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| New York City Transitional Finance Authority Building Aid Revenue | New York City Transitional Finance Authority Building Aid Revenue | 2026-02-28 | Removed / first absent |
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| New York State Dormitory Authority | New York State Dormitory Authority | 2026-02-28 | Removed / first absent |
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| Triborough Bridge & Tunnel Authority | Triborough Bridge & Tunnel Authority | 2026-02-28 | Removed / first absent |
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| Triborough Bridge & Tunnel Authority | Triborough Bridge & Tunnel Authority | 2026-02-28 | Removed / first absent |
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| City of Ashland KY | City of Ashland KY | 2026-02-28 | Removed / first absent |
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| Illinois Finance Authority | Illinois Finance Authority | 2026-02-28 | Removed / first absent |
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| Illinois Finance Authority | Illinois Finance Authority | 2026-02-28 | Removed / first absent |
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| New York City Housing Development Corp | New York City Housing Development Corp | 2026-02-28 | Removed / first absent |
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| Build NYC Resource Corp | Build NYC Resource Corp | 2026-02-28 | Removed / first absent |
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