f/overrides/event-backup/greux-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
2017-12-11,2.939000
2019-06-27,0.094000
2019-09-27,0.094000
2021-03-30,0.047000
2022-09-29,0.105000
2023-06-29,0.080000
2023-09-28,0.073000
2016-09-29,0.126000
2023-12-13,0.294000
2017-09-29,0.135000
2020-09-29,0.041000
2022-12-13,0.361000
2016-12-09,1.831000
2017-09-28,0.135000
2018-06-28,0.110000
2019-12-12,2.260000
2025-12-11,2.975000
2026-06-29,0.064000
2016-03-30,0.125000
2018-03-29,0.063000
2018-12-11,1.890000
2020-03-30,0.074000
2020-06-29,0.063000
2021-06-29,0.060000
2025-09-29,0.084000
2017-06-30,0.073000
2018-09-27,0.242000
2019-12-20,0.040000
2021-09-29,0.060000
2024-09-27,0.079000
2015-12-10,0.516000
2020-12-14,0.998000
2024-12-12,0.597000
2015-09-29,0.129000
2023-03-30,0.039000
2024-06-27,0.082000
2026-03-30,0.068000
2022-06-29,0.058000
2016-12-22,0.090000
2017-03-30,0.139000
2019-03-28,0.047000
2021-12-14,0.817000
2022-03-30,0.021000
2024-03-27,0.114000
2025-03-28,0.083000
2016-06-29,0.143000
2025-06-27,0.094000