f/overrides/event-backup/aadbx-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
2012-07-02,0.052000
2016-10-03,0.068000
2020-04-01,0.073000
2018-07-02,0.083000
2022-04-01,0.049000
2010-10-01,0.314000
2012-10-01,0.094000
2019-10-01,0.083000
2021-04-01,0.057000
2006-12-22,1.142000
2011-04-01,0.142000
2014-12-22,0.780000
2017-10-02,0.070000
2022-12-22,1.218000
2023-10-02,0.068000
2026-04-01,0.068000
1997-12-29,2.896000
2005-12-22,1.105000
2007-12-21,1.236000
2010-12-22,0.031000
2012-04-02,0.153000
2017-04-03,0.127000
2021-12-22,1.229000
2023-04-03,0.062000
2003-12-22,0.328000
2014-10-01,0.152000
2015-04-01,0.075000
2019-04-01,0.086000
2019-07-01,0.088000
2020-07-01,0.046000
2024-12-20,1.170000
1996-12-27,1.742000
2012-12-20,0.308000
2017-07-03,0.081000
2024-07-01,0.080000
2025-07-01,0.079000
2013-04-01,0.151000
2022-10-03,0.071000
2026-07-01,0.072000
2001-12-20,0.527000
2015-07-01,0.076000
2015-12-22,0.775000
2016-04-01,0.076000
2016-07-01,0.080000
2025-04-01,0.077000
1998-12-29,1.661000
2000-12-21,0.679000
2011-10-03,0.084000
2020-12-22,1.707000
2021-07-01,0.051000
2025-10-01,0.094000
2004-12-22,0.787000
2018-10-01,0.080000
2021-10-01,0.138000
2013-10-01,0.076000
2018-04-02,0.075000
2025-12-22,1.059000
2011-12-22,0.019000
2014-07-01,0.081000
2016-12-22,0.078000
2017-12-21,1.037000
2019-12-20,1.167000
2024-10-01,0.087000
2013-07-01,0.071000
2014-04-01,0.174000
2020-10-01,0.119000
2024-04-01,0.070000
1999-12-21,1.294000
2009-12-22,0.341000
2011-07-01,0.086000
2022-07-01,0.060000
2008-12-23,0.478000
2013-12-20,0.846000
2015-10-01,0.073000
2018-12-20,1.125000
2023-07-03,0.071000
2023-12-21,0.127000