f/overrides/event-backup/jrgrx-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
2017-12-15,0.459000
2022-06-23,0.120000
2026-03-24,0.108000
2017-09-25,0.075000
2019-03-25,0.118000
2020-03-25,0.138000
2020-06-24,0.152000
2021-12-17,1.469000
2022-09-23,0.166000
2018-03-26,0.065000
2019-06-24,0.123000
2021-06-24,0.123000
2022-03-24,0.114000
2025-03-24,0.122000
2025-12-19,2.254000
2021-03-25,0.108000
2023-06-23,0.172000
2023-09-22,0.144000
2023-12-19,0.308000
2024-03-21,0.117000
2024-06-21,0.165000
2018-06-25,0.078000
2018-09-24,0.095000
2020-09-24,0.149000
2021-09-23,0.132000
2022-12-19,1.293000
2023-03-24,0.144000
2024-09-23,0.173000
2024-12-20,2.419000
2025-06-23,0.157000
2026-06-23,0.156000
2019-09-24,0.138000
2018-12-14,0.303000
2019-12-13,0.211000
2020-12-18,0.235000
2025-09-23,0.142000