f/overrides/event-backup/ewre-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
2015-09-18,0.083131
2018-12-24,0.166440
2019-12-23,0.242910
2020-03-23,0.449760
2021-03-22,0.493450
2024-06-24,0.201890
2017-09-15,0.159300
2017-12-15,0.468900
2018-12-26,0.057750
2020-12-21,0.251690
2025-12-22,0.221500
2026-06-22,0.286100
2023-09-18,0.245900
2023-12-18,0.240930
2024-09-23,0.205530
2024-12-23,0.220830
2016-03-18,0.201885
2017-06-16,0.208000
2022-06-21,0.228340
2024-03-18,0.278570
2025-09-22,0.210090
2026-03-23,0.321100
2022-09-19,0.308690
2023-03-20,0.104880
2019-03-18,0.223590
2019-06-24,0.242080
2020-09-21,0.204210
2022-03-21,0.325790
2023-06-20,0.376710
2016-06-17,0.052774
2022-12-19,0.103340
2025-06-23,0.208510
2021-06-21,0.196260
2015-12-18,0.185413
2016-12-16,0.286995
2018-03-16,0.095300
2018-06-15,0.194490
2018-09-24,0.267300
2019-09-23,0.224040
2020-06-22,0.205680
2021-09-20,0.220650
2021-12-20,0.171160
2025-03-24,0.269440