f/overrides/event-backup/gqre-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
2017-12-21,0.782000
2018-06-18,0.524000
2019-03-15,0.133000
2019-09-20,0.436000
2014-03-21,0.145000
2016-12-22,1.173000
2019-12-20,1.676000
2020-12-18,0.329000
2021-03-19,0.053000
2022-09-16,0.562000
2025-03-21,0.124000
2026-06-18,0.582000
2013-12-27,0.193000
2015-12-23,0.500000
2016-09-19,0.354000
2017-03-20,0.031000
2018-12-21,0.701000
2021-06-18,0.420000
2022-12-16,0.363000
2024-03-15,0.053000
2015-06-19,0.311000
2016-03-21,0.386000
2021-12-17,1.039000
2023-06-16,0.441000
2025-09-19,0.506000
2026-03-20,0.077000
2020-06-19,0.482000
2021-09-17,0.234000
2020-03-20,0.065000
2020-09-18,0.304000
2022-06-17,0.415000
2023-12-15,0.503000
2024-06-21,0.438000
2017-06-19,0.423000
2018-03-19,0.058000
2022-03-18,0.009000
2023-09-15,0.498000
2024-12-20,1.247000
2014-06-20,0.544000
2019-06-21,0.532000
2024-09-20,0.413000
2025-12-19,1.569000
2014-09-19,0.200000
2016-06-20,0.433000
2015-09-18,0.296000
2018-09-24,0.504000
2023-03-17,0.178000
2025-06-20,0.596000
2014-12-29,0.561000
2015-03-20,0.210000