f/overrides/event-backup/edog-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
2015-06-24,0.422000
2017-09-21,0.240000
2018-06-21,0.263000
2021-06-17,0.394000
2022-03-24,0.147000
2024-09-19,0.090000
2017-03-22,0.095000
2018-12-20,0.323000
2019-09-19,0.273000
2020-03-19,0.098000
2020-12-22,0.775000
2023-03-23,0.089000
2026-06-18,0.390000
2022-12-22,0.202000
2014-06-25,0.494000
2017-12-21,0.088000
2018-03-22,0.140000
2020-06-18,0.304000
2020-09-17,0.112000
2021-03-18,0.133000
2021-12-22,0.143000
2023-06-22,0.606000
2015-03-25,0.120000
2016-12-21,0.091000
2024-03-21,0.079000
2024-06-20,0.623000
2025-12-18,0.202000
2026-03-19,0.320000
2015-09-23,0.220000
2018-09-20,0.359000
2019-03-21,0.261000
2022-09-22,0.308000
2025-06-20,0.375000
2014-09-24,0.168000
2015-12-23,0.118000
2023-09-21,0.513000
2025-09-18,0.293000
2014-12-24,0.139000
2019-06-20,0.366000
2019-12-19,0.172000
2022-06-23,0.393000
2023-12-21,0.206000
2016-06-22,0.241000
2016-09-21,0.197000
2017-06-21,0.312000
2021-09-23,0.331000
2024-12-19,0.560000
2025-03-20,0.216000