f/overrides/event-backup/fmltx-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
2023-09-29,0.067000
2015-03-27,0.008000
2018-12-28,0.475000
2019-03-27,0.007000
2022-06-15,0.413000
2021-12-30,2.919000
2022-06-30,0.040000
2024-03-28,0.058000
2024-06-17,0.001000
2015-12-30,0.484000
2016-06-28,0.168000
2016-12-29,0.126000
2020-06-26,0.397000
2022-09-30,0.038000
2023-03-31,0.054000
2023-12-28,0.086000
2024-06-28,0.069000
2014-06-26,0.214000
2019-06-26,0.220000
2020-09-28,0.049000
2020-12-30,0.214000
2024-12-30,0.317000
2025-06-16,0.619000
2018-09-26,0.107000
2025-12-30,0.575000
2021-06-28,0.367000
2021-09-28,0.049000
2016-03-29,0.004000
2017-03-29,0.086000
2018-06-27,0.199000
2021-03-29,0.005000
2015-06-26,0.242000
2019-09-26,0.039000
2019-12-30,0.201000
2020-03-27,0.007000
2014-12-30,0.641000
2022-12-29,0.033000
2023-06-15,0.068000
2024-09-30,0.059000
2017-12-28,0.244000
2018-03-27,0.009000
2023-06-30,0.081000
2026-06-15,0.578000