f/overrides/event-backup/gwlix-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
2007-06-22,0.029000
2011-06-17,0.126000
2011-12-14,0.052000
2016-12-22,0.132000
2007-12-21,0.020000
2013-12-20,0.064000
2014-06-13,0.164000
2015-06-19,0.139000
2015-12-18,0.043000
2004-12-28,0.036000
2006-12-27,0.022000
2012-12-20,0.034000
2014-12-19,0.028000
2015-09-18,0.033000
2017-12-21,1.334000
2011-09-16,0.031000
2019-12-20,0.466000
2025-12-19,0.300000
2008-06-16,0.054000
2014-03-14,0.252000
2015-03-20,0.033000
2021-12-22,1.938000
2024-12-20,0.086000
2009-03-20,0.025000
2012-03-16,0.067000
2018-12-20,1.076000
2023-12-21,0.090000
2006-06-23,0.033000
2006-09-22,0.032000
2008-12-19,0.027000
2012-06-15,0.114000
2013-09-13,0.035000
2014-09-12,0.030000
2022-12-21,2.974000