f/overrides/event-backup/flbl-dividend.csv
Greg Pomerantz bb8e39605e Event-history protection: backup dir, empty-download fallback, docs
Yahoo's 2026 event-feed change (capitalGain events dropped for some
funds; no events at all for terminated tickers) can wipe good event
history on re-download. Defense in depth:

- overrides/event-backup/: last-known-good copy of every dividend/
  capitalGain file (8,192 files, 58 MB); refresh with
  scripts/backup_events.py after each dump update
- data.py event_file(): frozen > data-root (while populated) > backup;
  used by panel reads, verify_official, and the double-listing scanner
- README: capital-gain files are mutual-fund-only in this dump; Yahoo
  has no LT/ST split (tax.py taxes capg at lt_rate; the per-fund split
  would come from fund-company annual tax statements or commercial feeds)
- tests: exact Timestamp .loc keys (pandas 3.x string matching returns a
  Series on large DatetimeIndex)
2026-08-31 21:59:25 -04:00

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Date,Dividends
2024-03-01,0.172000
2018-08-31,0.105000
2020-08-31,0.054000
2021-06-30,0.081000
2021-12-01,0.074000
2022-06-01,0.102000
2023-12-15,0.151000
2024-02-01,0.178000
2024-12-13,0.160000
2026-02-02,0.114000
2024-06-03,0.154000
2018-10-31,0.083000
2019-04-30,0.078000
2019-05-31,0.191000
2019-06-28,0.084000
2020-05-29,0.061000
2023-05-01,0.183000
2023-06-01,0.194000
2025-12-19,0.187000
2019-08-30,0.081000
2020-09-30,0.062000
2022-12-01,0.155000
2024-12-02,0.128000
2025-08-01,0.144000
2026-04-01,0.146000
2019-02-28,0.081000
2021-02-26,0.022000
2021-05-28,0.068000
2021-08-31,0.083000
2024-07-01,0.148000
2025-02-03,0.133000
2025-10-01,0.131000
2018-06-29,0.018000
2021-03-31,0.052000
2022-12-16,0.174000
2023-11-01,0.175000
2024-04-01,0.156000
2025-12-01,0.135000
2019-01-31,0.048000
2019-03-29,0.085000
2020-07-31,0.063000
2021-07-30,0.080000
2019-10-31,0.093000
2021-09-30,0.081000
2025-07-01,0.136000
2020-11-30,0.062000
2023-08-01,0.156000
2023-12-01,0.164000
2026-07-01,0.127000
2026-08-03,0.141000
2022-08-01,0.103000
2022-09-01,0.123000
2023-03-01,0.137000
2025-05-01,0.147000
2026-03-02,0.128000
2018-11-30,0.055000
2020-06-30,0.058000
2022-03-01,0.063000
2024-05-01,0.197000
2024-10-01,0.159000
2018-07-31,0.075000
2022-02-01,0.069000
2023-09-01,0.188000
2024-08-01,0.166000
2024-11-01,0.172000
2025-04-01,0.123000
2019-11-29,0.071000
2020-10-30,0.066000
2022-05-02,0.067000
2022-10-03,0.109000
2022-11-01,0.127000
2023-07-03,0.167000
2025-03-03,0.120000
2025-06-02,0.141000
2018-09-28,0.067000
2020-01-31,0.156000
2025-09-02,0.132000
2026-06-01,0.163000
2024-09-03,0.163000
2018-12-28,0.132000
2019-09-30,0.078000
2019-12-30,0.007000
2021-10-29,0.072000
2021-12-17,0.068000
2022-07-01,0.090000
2023-02-01,0.159000
2026-05-01,0.153000
2019-07-31,0.100000
2020-03-31,0.076000
2020-04-30,0.068000
2021-04-30,0.069000
2022-04-01,0.091000
2020-02-28,0.072000
2021-01-29,0.142000
2023-04-03,0.189000
2023-10-02,0.169000
2025-11-03,0.166000