f/overrides/event-backup/ftrtx-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
2021-12-30,1.376000
2006-12-28,0.142000
2018-06-27,0.177000
2020-03-27,0.025000
2022-06-15,0.288000
2025-12-30,0.758000
2018-03-27,0.042000
2018-12-28,0.478000
2023-03-31,0.106000
2023-06-15,0.006000
2013-12-30,0.428000
2020-06-26,0.276000
2008-12-29,0.132000
2011-03-29,0.025000
2023-09-29,0.069000
2017-09-27,0.081000
2022-06-30,0.053000
2022-03-31,0.008000
2024-09-30,0.069000
2012-03-28,0.010000
2018-09-26,0.059000
2010-09-28,0.048000
2019-09-26,0.057000
2024-12-30,0.214000
2026-06-15,0.312000
2009-06-30,0.100000
2009-09-28,0.056000
2021-03-29,0.010000
2023-06-30,0.071000
2015-03-27,0.008000
2016-03-29,0.014000
2013-03-26,0.035000
2015-12-30,0.401000
2016-09-28,0.069000
2017-03-29,0.050000
2021-06-28,0.233000
2010-03-29,0.003000
2011-09-28,0.044000
2014-06-26,0.232000
2016-06-28,0.146000
2022-12-29,0.033000
2024-03-28,0.077000
2012-12-28,0.151000
2014-03-27,0.029000
2017-12-28,0.100000
2020-09-28,0.045000
2024-06-28,0.077000
2015-06-26,0.207000
2016-12-29,0.051000
2009-12-29,0.075000
2013-06-26,0.106000
2007-06-15,0.012000
2009-03-31,0.013000
2010-12-29,0.134000
2015-09-28,0.061000
2019-03-27,0.040000
2019-06-26,0.154000
2020-12-30,0.117000
2022-09-30,0.049000
2007-09-17,0.015000
2007-12-28,0.177000
2023-12-28,0.072000
2007-03-15,0.002000
2010-04-30,0.015000
2014-09-26,0.031000
2014-12-30,0.668000
2019-12-30,0.216000
2021-09-28,0.048000
2025-06-16,0.403000
2008-03-17,0.011000
2011-12-28,0.104000