f/overrides/event-backup/fxo-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
2016-06-22,0.096000
2011-12-21,0.119000
2013-03-21,0.054000
2016-03-23,0.033000
2017-06-22,0.111000
2019-03-21,0.058000
2012-12-21,0.212000
2025-03-27,0.253000
2025-09-25,0.238000
2026-06-25,0.242000
2014-12-23,0.118000
2013-09-20,0.057000
2015-03-25,0.035000
2015-12-23,0.155000
2020-03-26,0.197000
2023-06-27,0.331000
2024-12-13,0.351000
2008-12-23,0.079000
2019-06-14,0.100000
2024-03-21,0.159000
2025-12-12,0.357000
2016-09-21,0.091000
2024-09-26,0.278000
2018-09-14,0.133000
2011-06-21,0.209000
2013-06-21,0.057000
2014-03-25,0.064000
2014-06-24,0.096000
2015-09-23,0.088000
2018-12-18,0.299000
2024-06-27,0.277000
2009-06-23,0.092000
2014-09-23,0.079000
2016-12-21,0.145000
2017-09-21,0.084000
2020-06-25,0.216000
2022-06-24,0.179000
2022-09-23,0.308000
2025-06-26,0.226000
2010-06-22,0.069000
2017-03-23,0.090000
2018-06-21,0.172000
2020-09-24,0.263000
2021-03-25,0.163000
2021-12-23,0.300000
2010-12-21,0.116000
2013-12-18,0.096000
2022-03-25,0.164000
2026-03-26,0.471000
2009-12-22,0.040000
2017-12-21,0.223000
2018-03-22,0.099000
2020-12-24,0.214000
2023-03-24,0.210000
2008-06-23,0.143000
2023-12-22,0.380000
2015-06-24,0.072000
2012-06-21,0.082000
2019-09-25,0.179000
2019-12-13,0.240000
2021-06-24,0.193000
2021-09-23,0.227000
2022-12-23,0.370000
2023-09-22,0.370000
2007-12-21,0.208000