f/overrides/event-backup/dibax-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
2015-11-02,0.086000
2018-08-01,0.042000
2021-05-03,0.025000
2021-12-21,0.159000
2007-12-28,0.519000
2012-11-01,0.093000
2014-12-30,0.427000
2015-08-03,0.078000
2022-05-02,0.060000
2010-11-01,0.131000
2011-12-28,0.171000
2017-12-28,0.484000
2007-11-01,0.087000
2008-12-30,0.535000
2016-12-29,0.021000
2011-05-02,0.073000
2024-12-18,0.282000
2025-12-22,0.244000
2015-12-30,0.435000
2013-12-27,0.070000
2007-08-01,0.086000
2008-05-01,0.067000
2012-05-01,0.052000
2013-05-01,0.097000
2014-11-03,0.072000
2015-05-01,0.073000
2018-05-01,0.049000
2006-11-01,0.099000
2009-11-02,0.118000
2014-05-01,0.055000
2017-11-01,0.076000
2016-11-01,0.027000
2026-05-01,0.074000
2012-12-27,0.338000
2020-12-21,0.346000
2009-08-03,0.059000
2010-12-29,0.701000
2013-08-01,0.062000
2008-11-03,0.116000
2011-08-01,0.100000
2018-11-01,0.059000
2006-08-01,0.068000
2021-08-02,0.015000
2026-08-03,0.080000
2021-11-01,0.036000
2006-12-28,0.312000
2007-05-01,0.049000
2013-11-01,0.039000
2014-08-01,0.070000
2009-12-29,0.308000
2011-11-01,0.050000
2018-12-27,0.321000
2025-11-03,0.068000
2006-05-01,0.076000
2008-08-01,0.071000
2010-05-03,0.120000
2012-08-01,0.090000