f/overrides/event-backup/lvhd-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
2026-05-07,0.323000
2022-02-03,0.079000
2024-11-07,0.370000
2025-05-08,0.246000
2020-11-05,0.286000
2021-11-04,0.231000
2023-11-02,0.385000
2024-08-08,0.377000
2024-12-31,0.346000
2016-06-24,0.148000
2016-12-23,0.237000
2019-05-02,0.284000
2025-02-06,0.065000
2025-08-07,0.330000
2026-02-05,0.085000
2020-05-07,0.286000
2021-08-05,0.249000
2022-11-03,0.319000
2016-09-26,0.217000
2017-12-26,0.275000
2019-11-07,0.307000
2021-02-04,0.067000
2022-12-29,0.292000
2025-11-06,0.344000
2026-08-06,0.383000
2018-03-26,0.242000
2019-12-30,0.207000
2020-08-06,0.282000
2023-05-04,0.281000
2023-08-03,0.365000
2024-05-02,0.394000
2025-12-30,0.354000
2017-06-26,0.260000
2021-12-29,0.231000
2023-02-02,0.048000
2022-08-04,0.304000
2023-12-28,0.211000
2018-09-25,0.306000
2018-12-26,0.281000
2020-12-30,0.197000
2017-03-27,0.255000
2022-05-05,0.263000
2024-02-08,0.138000
2019-08-08,0.078000
2020-02-06,0.011000
2021-05-06,0.249000
2017-09-26,0.259000
2018-06-26,0.265000
2019-03-26,0.249000