f/overrides/event-backup/gblax-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
2015-03-27,0.080000
2015-12-23,0.664000
2024-06-21,0.220000
2012-12-27,0.185000
2014-09-25,0.116000
2019-12-19,0.150000
2019-09-20,0.138000
2020-12-18,0.138000
2023-06-23,0.190000
2012-06-28,0.157000
2014-03-28,0.168000
2017-09-22,0.130000
2023-12-19,0.146000
2013-03-27,0.093000
2013-06-27,0.150000
2013-09-26,0.096000
2018-06-22,0.229000
2018-09-21,0.145000
2020-06-19,0.090000
2021-09-24,0.176000
2024-12-20,1.500000
2026-03-20,0.180000
2017-03-24,0.085000
2019-06-21,0.210000
2025-12-19,1.875000
2014-12-26,0.822000
2016-03-24,0.090000
2016-09-22,0.180000
2017-12-21,0.632000
2021-12-21,1.840000
2022-12-20,0.116000
2025-03-21,0.180000
2018-03-23,0.159000
2019-03-22,0.145000
2011-06-17,0.090000
2011-09-16,0.097000
2012-03-29,0.093000
2013-12-27,0.624000
2018-12-20,0.155000
2012-09-27,0.120000
2014-06-26,0.180000
2015-09-24,0.090000
2021-03-26,0.155000
2022-03-25,0.130000
2022-09-23,0.040000
2024-09-23,0.187000
2016-12-22,0.168000
2023-03-24,0.100000
2023-09-22,0.150000
2025-06-20,0.300000
2015-06-25,0.090000
2016-06-23,0.150000
2022-06-24,0.208000
2024-03-22,0.120000
2026-06-18,0.220000
2017-06-23,0.177000
2021-06-25,0.146000
2025-09-22,0.200000
2011-12-23,0.093000
2020-03-20,0.100000
2020-09-18,0.135000