f/overrides/event-backup/driix-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
2019-12-17,0.111000
2022-12-14,0.372000
2026-03-30,0.057000
2023-09-28,0.094000
2023-12-13,0.352000
2024-03-27,0.039000
2024-09-27,0.120000
2017-06-29,0.074000
2021-03-30,0.038000
2022-09-29,0.078000
2017-12-15,0.119000
2018-12-18,0.098000
2021-06-29,0.070000
2025-06-27,0.129000
2016-03-30,0.048000
2016-06-29,0.069000
2017-09-28,0.027000
2018-03-28,0.018000
2023-03-30,0.036000
2023-06-29,0.085000
2020-09-29,0.053000
2018-09-27,0.062000
2019-06-27,0.084000
2019-09-27,0.064000
2024-06-27,0.104000
2025-03-28,0.048000
2016-09-29,0.027000
2019-03-28,0.038000
2020-03-30,0.046000
2021-12-15,0.235000
2022-03-30,0.034000
2026-06-29,0.162000
2015-12-16,0.011000
2017-03-30,0.035000
2021-09-29,0.065000
2022-06-29,0.077000
2024-12-13,0.337000
2025-09-29,0.123000
2025-12-15,0.306000
2018-06-28,0.077000
2020-06-29,0.060000
2020-12-16,0.277000