f/overrides/event-backup/fdl-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
2021-03-25,0.237000
2008-06-23,0.223000
2012-06-21,0.166000
2014-09-23,0.202000
2023-12-22,0.517000
2026-03-26,0.401000
2011-03-22,0.150000
2011-06-21,0.181000
2013-09-20,0.115000
2014-03-25,0.192000
2015-09-23,0.192000
2015-12-23,0.246000
2017-12-21,0.289000
2007-12-21,0.263000
2008-09-22,0.196000
2009-12-22,0.173000
2016-03-23,0.168000
2019-12-13,0.357000
2024-09-26,0.388000
2025-03-27,0.357000
2026-06-25,0.473000
2006-06-23,0.200000
2006-12-21,0.200000
2010-06-22,0.166000
2013-03-21,0.181000
2022-09-23,0.402000
2006-09-25,0.200000
2009-09-22,0.154000
2020-09-24,0.299000
2022-12-23,0.389000
2024-12-31,0.300000
2012-09-21,0.180000
2013-06-21,0.194000
2025-12-12,0.550000
2012-03-21,0.157000
2022-03-25,0.279000
2015-06-24,0.219000
2017-06-22,0.238000
2018-12-18,0.352000
2019-03-21,0.229000
2007-09-21,0.220000
2010-03-23,0.137000
2021-09-23,0.275000
2022-06-24,0.237000
2010-12-21,0.141000
2012-12-21,0.206000
2009-06-23,0.102000
2014-06-24,0.193000
2015-03-25,0.208000
2017-03-23,0.216000
2018-06-21,0.262000
2020-03-26,0.290000
2020-06-25,0.369000
2023-06-27,0.457000
2007-03-23,0.200000
2014-12-23,0.216000
2018-09-14,0.242000
2020-12-24,0.368000
2021-12-30,0.345000
2023-03-24,0.310000
2024-12-13,0.490000
2016-09-21,0.201000
2016-12-21,0.266000
2013-12-18,0.196000
2016-06-22,0.180000
2024-06-27,0.485000
2007-06-21,0.200000
2011-12-21,0.143000
2010-09-21,0.134000
2021-06-24,0.348000
2011-09-21,0.136000
2019-09-25,0.382000
2024-03-21,0.332000
2008-12-23,0.180000
2009-03-23,0.143000
2018-03-22,0.226000
2019-06-14,0.255000
2021-12-23,0.428000
2023-09-22,0.361000
2025-06-26,0.458000
2025-09-25,0.424000
2008-03-24,0.206000
2017-09-21,0.213000