f/overrides/event-backup/focpx-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
1989-09-07,0.095000
2004-12-17,0.040000
1989-12-07,0.197000
1990-09-07,0.060000
1997-12-26,0.145000
2017-09-15,0.475900
1995-12-15,0.121000
2023-12-01,0.010000
2025-12-12,0.841000
2025-09-12,1.047000
1993-09-03,0.205000
1993-12-10,0.147000
1995-09-08,0.061000
1997-09-05,0.107000
2014-12-12,0.352700
2015-12-11,0.064400
2019-12-20,0.133000
1985-09-30,0.001000
1999-12-17,0.135000
2021-12-17,0.530000
2024-12-13,0.676000
1988-12-14,0.030000
1994-12-09,0.021000
2018-09-14,0.492000
2013-12-13,0.373600
2015-09-11,0.386900
1986-10-13,0.129000
1991-12-13,0.123000
1996-12-13,0.155000
2018-12-07,0.297000
2020-12-18,0.091000
1990-12-14,0.003000
1998-09-04,0.238000
2012-12-14,0.025000
2024-09-13,2.246000
2014-09-05,0.674800
2020-09-11,1.000000
1992-12-11,0.055000
2016-12-09,0.270000
2017-12-08,0.057700
1991-09-06,0.140000
2000-12-22,0.079000
2022-09-09,0.521000
2000-09-08,1.187000
2004-12-29,0.001000
2012-12-27,0.002200
2012-12-31,0.001000
2013-09-06,0.673000
2021-09-10,1.730000
1996-09-06,0.285000
1987-12-15,0.195000
1992-09-04,0.194000
1999-09-03,0.416000
2019-09-13,0.837000