f/overrides/event-backup/jpib-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
2017-04-24,0.073000
2024-05-01,0.169000
2025-02-03,0.184000
2025-06-02,0.177000
2017-11-24,0.358000
2019-06-28,0.056000
2020-02-28,0.155000
2023-11-01,0.136000
2024-02-01,0.148000
2022-07-01,0.150000
2017-12-26,0.463000
2018-03-26,0.157000
2018-08-31,0.140000
2020-12-30,0.288000
2021-07-01,0.095000
2021-11-01,0.097000
2021-12-30,0.218000
2026-06-01,0.166000
2019-10-31,0.141000
2020-06-01,0.127000
2020-09-01,0.123000
2021-12-01,0.107000
2022-12-29,0.059000
2025-10-01,0.197000
2019-03-29,0.144000
2019-11-29,0.148000
2024-08-01,0.195000
2024-10-01,0.220000
2024-12-02,0.185000
2026-05-01,0.268000
2026-03-02,0.191000
2017-06-23,0.025000
2019-05-31,0.051000
2019-09-30,0.137000
2020-11-02,0.121000
2021-08-02,0.094000
2023-10-02,0.188000
2024-06-03,0.190000
2026-08-03,0.136000
2021-02-01,0.087000
2022-03-01,0.129000
2022-12-01,0.097000
2023-08-01,0.231000
2024-07-01,0.181000
2025-12-31,0.264000
2026-07-01,0.146000
2021-03-01,0.102000
2023-12-28,0.134000
2024-11-01,0.186000
2018-01-25,0.131000
2020-10-01,0.131000
2022-04-01,0.105000
2024-09-03,0.182000
2025-04-01,0.201000
2026-04-01,0.190000
2018-10-31,0.163000
2022-08-01,0.115000
2023-04-03,0.075000
2023-06-01,0.247000
2023-12-01,0.138000
2025-12-01,0.194000
2017-10-25,0.106000
2018-12-28,1.571000
2020-05-01,0.236000
2022-05-02,0.265000
2022-09-01,0.118000
2025-03-03,0.189000
2025-09-02,0.202000
2026-02-02,0.193000
2020-12-01,0.126000
2021-05-03,0.112000
2021-09-01,0.098000
2024-12-31,0.191000
2025-07-01,0.183000
2023-09-01,0.232000
2018-02-22,0.182000
2018-07-31,0.088000
2018-09-28,0.158000
2019-01-31,0.146000
2019-08-30,0.145000
2022-10-03,0.105000
2023-02-01,0.076000
2024-03-01,0.123000
2024-04-01,0.193000
2025-08-01,0.184000
2018-11-30,0.170000
2020-01-31,0.167000
2022-11-01,0.078000
2023-03-01,0.179000
2019-04-30,0.046000
2021-04-01,0.100000
2021-06-01,0.098000
2021-10-01,0.103000
2022-02-01,0.093000
2023-07-03,0.242000
2025-11-03,0.180000
2019-02-28,0.165000
2019-07-31,0.128000
2019-12-30,1.024000
2020-04-01,0.157000
2022-06-01,0.112000
2023-05-01,0.203000
2025-05-01,0.204000