f/overrides/event-backup/dvye-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
2016-12-22,0.082000
2016-12-28,0.031000
2017-03-24,0.121000
2017-09-26,0.902000
2019-03-20,0.245000
2021-12-13,0.444000
2014-06-24,0.826000
2016-06-21,0.684000
2024-03-21,0.106000
2025-03-18,0.177000
2023-06-07,0.866000
2023-09-26,0.693000
2021-09-24,0.676000
2025-09-16,0.551000
2018-03-22,0.157000
2018-09-26,1.051000
2020-06-15,0.720000
2023-03-23,0.090000
2024-09-25,0.810000
2014-12-19,0.053000
2016-09-26,0.674000
2017-12-21,0.457000
2021-12-30,0.091000
2013-09-30,0.754000
2015-06-24,0.779000
2025-06-16,0.684000
2015-09-25,0.758000
2017-06-20,0.531000
2020-12-14,0.320000
2022-03-24,0.247000
2023-12-20,0.748000
2025-12-15,0.420000
2012-03-23,0.142000
2013-06-25,0.831000
2026-06-15,0.572000
2018-06-19,0.511000
2026-03-17,0.104000
2012-06-20,0.886000
2015-03-25,0.250000
2020-12-30,0.076000
2013-03-22,0.238000
2020-03-25,0.354000
2020-09-23,0.493000
2015-12-21,0.177000
2018-12-18,0.412000
2024-12-17,1.423000
2013-12-17,0.416000
2024-06-11,0.711000
2022-09-26,0.773000
2014-09-24,0.761000
2019-06-17,0.938000
2021-06-10,1.302000
2012-12-14,0.132000
2021-03-25,0.300000
2022-12-13,0.734000
2019-09-24,0.782000
2022-06-09,0.633000
2019-12-16,0.458000
2012-09-24,0.754000
2014-03-25,0.245000