f/overrides/event-backup/fgtzx-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
2013-12-30,0.493000
2014-12-30,0.471000
2021-12-30,2.422000
2022-06-15,0.595000
2005-12-29,0.157000
2006-03-13,0.054000
2006-09-15,0.057000
2013-06-26,0.225000
2017-03-29,0.093000
2022-06-30,0.045000
2012-03-28,0.043000
2023-06-15,0.364000
2024-09-30,0.071000
2009-06-30,0.005000
2019-03-27,0.014000
2021-03-29,0.009000
2023-06-30,0.090000
2024-03-28,0.075000
2025-06-16,0.885000
2010-12-29,0.221000
2013-03-26,0.014000
2018-06-27,0.276000
2021-09-28,0.037000
2023-03-31,0.022000
2025-09-30,0.084000
2017-06-28,0.436000
2018-03-27,0.004000
2025-12-30,0.920000
2008-03-31,0.009000
2009-12-29,0.118000
2015-06-26,0.644000
2020-03-27,0.019000
2023-09-29,0.076000
2024-12-30,0.274000
2014-03-27,0.006000
2019-06-26,0.123000
2026-06-30,0.790000
2010-03-29,0.005000
2011-03-29,0.068000
2020-09-28,0.050000
2020-12-30,0.365000
2023-12-28,0.078000
2024-06-28,0.086000
2006-12-28,0.235000
2008-12-29,0.242000
2011-12-28,0.211000
2014-06-26,0.307000
2019-12-30,1.930000
2007-03-12,0.004000
2009-09-28,0.098000
2015-03-27,0.003000
2015-12-30,0.690000
2017-12-28,0.954000
2022-09-30,0.052000
2012-12-28,0.241000
2016-03-29,0.004000
2018-12-28,1.330000
2025-06-30,0.113000
2007-12-28,0.280000
2009-03-31,0.023000
2020-06-26,0.614000
2007-09-17,0.063000
2016-06-28,0.329000
2016-12-29,0.180000
2021-06-28,0.437000
2022-12-29,0.116000
2026-03-31,0.014000