f/overrides/event-backup/hyup-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
2019-02-01,0.282000
2019-06-03,0.270000
2020-04-01,0.260000
2021-08-02,0.220000
2022-06-01,0.230000
2023-07-03,0.267000
2025-03-03,0.240000
2018-09-04,0.260000
2026-08-03,0.270000
2018-04-02,0.250000
2018-12-03,0.276000
2020-02-03,0.276000
2020-03-02,0.275000
2020-07-01,0.238000
2021-10-01,0.220000
2022-05-02,0.222000
2018-03-01,0.254000
2025-12-01,0.270000
2025-07-01,0.231000
2019-10-01,0.283000
2023-02-01,0.243000
2024-04-01,0.270000
2018-08-01,0.262000
2019-03-01,0.284000
2019-04-01,0.283000
2020-11-02,0.250000
2022-04-01,0.224000
2023-03-01,0.223000
2024-12-02,0.264000
2025-02-03,0.276000
2018-06-01,0.261000
2026-02-02,0.247000
2021-12-01,0.188000
2022-11-01,0.247000
2023-05-01,0.260000
2023-09-01,0.260000
2023-12-21,0.257000
2026-04-01,0.273000
2019-08-01,0.276000
2021-02-01,0.300000
2021-05-03,0.251000
2019-07-01,0.275000
2019-09-04,0.271000
2019-12-20,0.268000
2022-02-01,0.233000
2022-09-01,0.267000
2024-09-03,0.273000
2024-12-23,0.279000
2018-07-03,0.261000
2020-06-01,0.245000
2020-10-01,0.250000
2022-03-01,0.182000
2023-06-01,0.269000
2023-10-02,0.247000
2020-05-01,0.231000
2018-10-02,0.275000
2020-12-22,0.611000
2024-06-03,0.273000
2025-09-02,0.288000
2025-12-22,0.282000
2026-06-01,0.265000
2018-02-01,0.239000
2020-09-01,0.216000
2024-03-01,0.250000
2018-11-01,0.268000
2024-11-01,0.272000
2025-08-01,0.248000
2021-06-01,0.251000
2021-04-01,0.284000
2022-12-01,0.214000
2023-12-01,0.257000
2024-10-01,0.304000
2025-04-01,0.276000
2025-06-02,0.287000
2026-03-02,0.194000
2021-03-01,0.315000
2020-12-01,0.250000
2021-12-22,0.244000
2022-10-03,0.227000
2022-12-22,0.230000
2023-04-03,0.266000
2025-10-01,0.258000
2018-12-21,0.277000
2021-09-01,0.220000
2022-07-01,0.220000
2023-11-01,0.260000
2024-02-01,0.263000
2024-05-01,0.262000
2024-07-01,0.263000
2024-08-01,0.273000
2018-05-01,0.259000
2025-11-03,0.224000
2026-05-01,0.270000
2025-05-01,0.257000
2019-12-03,0.278000
2020-08-03,0.216000
2021-07-01,0.251000
2021-11-01,0.204000
2022-08-01,0.263000
2019-05-01,0.275000
2023-08-01,0.253000
2026-07-01,0.254000
2019-11-01,0.276000