LDSF 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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| FEMB | First Trust Emerging Markets Local Currency Bond ETF | 2025-08-31 | Added / first present |
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| FPEI | First Trust Institutional Preferred Securities and Income ETF | 2025-02-28 | Added / first present |
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| FTCB | First Trust Core Investment Grade ETF | 2025-02-28 | Added / first present |
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| FIIG | First Trust Intermediate Duration Investment Grade Corporate ETF | 2024-11-30 | Added / first present |
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| FEMB | First Trust Emerging Markets Local Currency Bond ETF | 2024-08-31 | Added / first present |
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| FTSL | First Trust Senior Loan ETF | 2024-05-31 | Added / first present |
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| MBB | iShares MBS ETF | 2024-02-29 | Added / first present |
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| IEI | iShares 3-7 Year Treasury Bond ETF | 2023-08-31 | Added / first present |
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| FSIG | First Trust Limited Duration Investment Grade Corporate ETF | 2023-02-28 | Added / first present |
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| SHY | iShares 1-3 Year Treasury Bond ETF | 2022-11-30 | Added / first present |
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| FTSM | First Trust Enhanced Short Maturity ETF | 2022-05-31 | Added / first present |
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| UCON | First Trust Tcw Unconstrained Plus Bond Etf | 2021-08-31 | Added / first present |
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| CMBS | iShares CMBS ETF | 2021-05-28 | Added / first present |
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| FTSL | First Trust Senior Loan ETF | 2021-02-26 | Added / first present |
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| MISXX | Morgan Stanley Institutional Liquidity Funds - Treasury Portfolio | 2020-11-30 | Added / first present |
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| FTSL | FIRST TRUST SENIOR LOAN | 2020-08-31 | Added / first present |
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| SLQD | iShares 0-5 Year Investment Grade Corporate Bond ETF | 2020-05-29 | Added / first present |
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Removals
| Ticker | Issuer | Observed date | Change |
|---|
| FTCB | First Trust Core Investment Grade ETF | 2025-08-31 | Removed / first absent |
|---|
| FIIG | First Trust Intermediate Duration Investment Grade Corporate ETF | 2025-02-28 | Removed / first absent |
|---|
| FEMB | First Trust Emerging Markets Local Currency Bond ETF | 2025-02-28 | Removed / first absent |
|---|
| MBB | iShares MBS ETF | 2024-05-31 | Removed / first absent |
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| IEI | iShares 3-7 Year Treasury Bond ETF | 2025-02-28 | Removed / first absent |
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| SHY | iShares 1-3 Year Treasury Bond ETF | 2023-05-31 | Removed / first absent |
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| UCON | First Trust Tcw Unconstrained Plus Bond Etf | 2023-11-30 | Removed / first absent |
|---|
| CMBS | iShares CMBS ETF | 2022-02-28 | Removed / first absent |
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| FTSL | First Trust Senior Loan ETF | 2022-08-31 | Removed / first absent |
|---|
| FTSL | FIRST TRUST SENIOR LOAN | 2020-11-30 | Removed / first absent |
|---|
| SLQD | iShares 0-5 Year Investment Grade Corporate Bond ETF | 2023-02-28 | Removed / first absent |
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| MBB | iShares MBS ETF | 2020-02-28 | Removed / first absent |
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| MISXX | Morgan Stanley Institutional Liquidity Funds - Treasury Portfolio | 2020-08-31 | Removed / first absent |
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| FEMB | FIRST TRUST EMERGING MARKETS LOCAL CURRENCY BOND ETF | 2022-08-31 | Removed / first absent |
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| FTSM | FIRST TRUST ENHANCED SHORT MATURITY ETF | 2022-02-28 | Removed / first absent |
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| FTSL | FIRST TRUST SENIOR LOAN ETF | 2020-05-29 | Removed / first absent |
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| FIXD | First Trust TCW Opportunistic Fixed Income ETF | 2021-08-31 | Removed / first absent |
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