f/overrides/event-backup/lglv-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
2015-03-20,0.401000
2016-09-16,0.474000
2019-09-20,0.521000
2019-12-20,0.727000
2013-12-20,1.115000
2019-06-21,0.484000
2020-06-19,0.521000
2016-06-17,0.509000
2023-03-17,0.594000
2024-03-15,0.644000
2017-09-15,0.418000
2019-03-15,0.431000
2014-09-19,0.396000
2022-06-17,0.709000
2015-09-18,0.413000
2024-09-20,0.740000
2021-09-17,0.498000
2025-09-22,0.841000
2013-03-15,0.111000
2014-06-20,0.385000
2014-12-19,4.183000
2016-12-16,0.662000
2017-12-15,2.790000
2023-12-15,1.027000
2025-12-22,0.954000
2013-09-20,0.415000
2015-12-18,0.975000
2017-03-17,0.342000
2022-12-16,0.779000
2024-06-21,0.827000
2025-03-24,0.776000
2013-06-21,0.405000
2018-03-16,0.352000
2020-09-18,0.419000
2021-03-19,0.725000
2021-12-17,0.627000
2026-03-23,0.966000
2022-03-18,0.485000
2022-09-16,0.673000
2018-09-21,0.477000
2018-12-21,0.581000
2020-03-20,0.469000
2016-03-18,0.392000
2023-06-16,0.627000
2025-06-23,0.832000
2026-06-22,0.966000
2024-12-20,0.981000
2014-03-21,0.362000
2015-06-19,0.407000
2017-06-16,0.422000
2020-12-18,0.964000
2018-06-15,0.453000
2023-09-15,0.691000