f/overrides/event-backup/flqm-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
2020-09-14,0.130000
2021-06-10,0.092000
2023-12-15,0.249000
2025-12-19,0.315000
2017-09-20,0.107000
2019-09-11,0.174000
2019-12-11,0.190000
2020-06-11,0.053000
2026-06-26,0.355000
2022-06-17,0.120000
2022-09-16,0.159000
2025-06-27,0.226000
2026-03-20,0.127000
2023-06-23,0.138000
2023-09-15,0.136000
2024-09-20,0.192000
2018-03-20,0.051000
2020-03-11,0.069000
2020-12-14,0.163000
2021-09-13,0.127000
2017-12-20,0.178000
2019-06-11,0.037000
2022-12-16,0.203000
2024-03-15,0.082000
2018-09-20,0.135000
2018-12-20,0.138000
2024-06-21,0.181000
2022-03-10,0.069000
2023-03-17,0.086000
2017-06-20,0.033000
2019-03-20,0.053000
2021-03-11,0.066000
2024-12-20,0.239000
2018-06-20,0.050000
2021-12-13,0.223000
2025-03-21,0.108000
2025-09-19,0.189000