f/overrides/event-backup/faf-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
2024-09-20,0.540000
2011-06-28,0.060000
2011-12-28,0.060000
2012-09-26,0.080000
2019-12-06,0.420000
2020-09-04,0.440000
2023-12-07,0.530000
2024-03-07,0.530000
2018-12-07,0.420000
2019-03-07,0.420000
2013-09-05,0.120000
2014-03-06,0.120000
2023-06-07,0.520000
2015-09-03,0.250000
2021-06-07,0.460000
2025-03-10,0.540000
2011-03-29,0.060000
2017-12-07,0.380000
2025-06-09,0.540000
2026-03-09,0.550000
2012-12-12,0.120000
2015-12-04,0.250000
2021-12-07,0.510000
2010-12-29,0.060000
2017-06-06,0.340000
2022-09-07,0.520000
2025-12-08,0.550000
2011-09-28,0.060000
2016-03-04,0.260000
2020-03-06,0.440000
2022-06-07,0.510000
2023-03-07,0.520000
2024-06-10,0.530000
2019-09-06,0.420000
2010-06-28,0.060000
2010-09-28,0.060000
2012-03-28,0.080000
2014-06-05,0.240000
2015-03-05,0.250000
2017-09-07,0.380000
2018-06-07,0.380000
2016-06-06,0.260000
2016-09-06,0.340000
2021-09-07,0.510000
2014-12-04,0.240000
2018-03-07,0.380000
2018-09-07,0.420000
2020-06-05,0.440000
2021-03-05,0.460000
2026-06-08,0.550000
2014-09-04,0.240000
2015-06-04,0.250000
2019-06-07,0.420000
2023-09-07,0.530000
2012-06-27,0.080000
2016-12-06,0.340000
2022-12-07,0.520000
2013-12-05,0.120000
2024-12-09,0.540000
2017-03-06,0.340000
2013-03-06,0.120000
2013-06-06,0.120000
2020-12-07,0.460000
2022-03-07,0.510000
2025-09-22,0.550000