f/overrides/event-backup/gsrfx-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
2026-06-29,0.054000
2022-09-29,0.055000
2023-06-29,0.211000
2025-09-29,0.059000
2022-12-13,1.336000
2023-12-22,0.037000
2024-03-27,0.062000
2025-03-28,0.058000
2026-03-30,0.053000
2018-12-11,9.043000
2020-03-30,0.049000
2020-06-29,0.062000
2025-06-27,0.056000
2018-03-29,0.063000
2020-12-14,0.043000
2021-06-29,0.066000
2025-12-30,0.032000
2018-09-27,0.233000
2020-09-29,0.087000
2020-12-30,0.281000
2021-03-30,0.067000
2022-06-29,0.066000
2025-12-11,1.168000
2023-12-13,0.679000
2024-06-27,0.063000
2019-03-28,0.133000
2021-12-30,0.055000
2022-03-30,0.057000
2021-12-14,1.169000
2023-03-30,0.114000
2024-12-12,1.346000
2018-03-28,0.070000
2019-12-12,0.981000
2019-12-18,0.079000
2022-12-29,0.112000
2023-09-28,0.080000
2024-09-27,0.059000
2024-12-30,0.048000
2018-06-28,0.110000
2019-06-27,0.066000
2019-09-27,0.068000