f/overrides/event-backup/eudg-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
2023-12-22,0.110000
2024-06-25,0.450000
2015-09-21,0.030000
2017-03-27,0.080000
2018-09-25,0.079000
2018-12-24,0.145000
2022-03-25,0.250000
2023-03-27,0.130000
2017-12-26,0.032000
2020-03-24,0.113000
2014-06-23,0.066000
2014-09-22,0.057000
2015-12-21,0.049000
2016-09-26,0.060000
2016-12-23,0.043000
2017-09-26,0.050000
2021-09-24,0.410000
2025-12-26,0.197000
2016-06-20,0.330000
2019-03-26,0.135000
2019-06-24,0.265000
2021-03-25,0.193000
2021-06-24,0.355000
2025-06-25,0.470000
2024-12-31,0.053000
2025-03-26,0.090000
2015-03-23,0.116000
2019-09-24,0.145000
2020-12-21,0.111000
2021-12-27,0.067000
2024-03-22,0.090000
2024-09-25,0.050000
2026-03-26,0.125000
2017-06-26,0.255000
2025-09-25,0.065000
2026-06-25,0.535000
2018-06-25,0.379000
2020-06-23,0.165000
2020-09-22,0.180000
2022-06-24,0.385000
2022-09-26,0.150000
2023-06-26,0.400000
2018-03-20,0.065000
2024-12-26,0.076000
2014-12-19,0.093000
2015-06-22,0.279000
2019-12-23,0.096000
2022-12-23,0.054000
2023-09-25,0.040000