f/overrides/event-backup/jeprx-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
2025-09-30,0.090000
2025-10-31,0.085000
2019-09-30,0.128000
2020-09-30,0.123000
2021-12-31,0.118000
2022-06-30,0.160000
2022-12-30,0.146000
2025-01-31,0.090000
2019-06-28,0.116000
2021-02-26,0.108000
2021-08-31,0.094000
2022-11-30,0.162000
2023-12-29,0.092000
2021-03-31,0.116000
2021-10-29,0.094000
2023-04-28,0.106000
2023-11-30,0.100000
2024-01-31,0.078000
2025-04-30,0.117000
2019-02-28,0.098000
2020-12-31,0.135000
2022-04-29,0.122000
2023-06-30,0.091000
2024-08-30,0.097000
2024-11-29,0.102000
2022-05-31,0.146000
2023-01-31,0.128000
2023-03-31,0.120000
2023-10-31,0.091000
2024-09-30,0.101000
2021-04-30,0.099000
2021-07-30,0.082000
2022-01-31,0.108000
2024-10-31,0.093000
2025-08-29,0.088000
2020-01-31,0.083000
2020-08-31,0.128000
2022-03-31,0.156000
2024-02-29,0.081000
2024-03-28,0.089000
2024-12-31,0.096000
2026-03-31,0.114000
2026-05-29,0.100000
2019-04-30,0.076000
2023-02-28,0.110000
2025-06-30,0.103000
2025-12-31,0.105000
2026-01-30,0.091000
2026-02-27,0.088000
2026-07-31,0.094000
2024-04-30,0.081000
2024-07-31,0.074000
2020-03-31,0.167000
2021-01-29,0.124000
2021-05-28,0.103000
2021-06-30,0.104000
2021-11-30,0.104000
2023-07-31,0.079000
2020-06-30,0.149000
2020-07-31,0.135000
2025-03-31,0.111000
2019-05-31,0.097000
2019-12-31,0.100000
2022-09-30,0.136000
2025-07-31,0.092000
2023-08-31,0.087000
2023-09-29,0.088000
2019-11-29,0.095000
2020-04-30,0.203000
2020-11-30,0.151000
2021-09-30,0.101000
2022-08-31,0.140000
2022-10-31,0.160000
2025-05-30,0.135000
2025-11-28,0.095000
2024-05-31,0.094000
2024-06-28,0.085000
2019-01-31,0.113000
2019-03-29,0.095000
2019-07-31,0.089000
2019-08-30,0.106000
2019-10-31,0.097000
2023-05-31,0.099000
2026-06-30,0.101000
2020-02-28,0.098000
2020-10-30,0.137000
2022-02-28,0.127000
2020-05-29,0.177000
2026-04-30,0.109000
2022-07-29,0.141000
2025-02-28,0.082000