f/overrides/event-backup/aaiix-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
2012-06-27,0.053000
2021-07-28,0.030000
2023-09-27,0.030000
2024-07-29,0.030000
2015-08-27,0.048000
2018-10-29,0.028000
2020-02-26,0.026000
2021-01-27,0.030000
2004-08-27,0.050000
2008-06-26,0.053000
2012-03-28,0.053000
2014-12-26,0.048000
2021-12-28,0.030000
2022-06-28,0.030000
2022-12-28,0.030000
2015-01-29,0.048000
2017-04-26,0.033000
2017-05-26,0.033000
2018-02-26,0.030000
2008-09-26,0.053000
2011-07-27,0.053000
2012-01-27,0.053000
2012-05-29,0.053000
2023-04-26,0.030000
2023-06-28,0.030000
2026-02-25,0.035000
2011-05-26,0.053000
2012-08-29,0.053000
2017-08-29,0.033000
2019-02-26,0.026000
2004-12-29,0.100000
2008-07-29,0.053000
2010-09-28,0.053000
2011-01-27,0.053000
2019-12-26,0.026000
2021-04-28,0.030000
2025-09-26,0.035000
2004-06-30,0.050000
2016-04-27,0.043000
2018-04-26,0.030000
2020-11-25,0.030000
2010-06-28,0.053000
2019-07-29,0.026000
2024-03-26,0.030000
2021-03-29,0.030000
2021-05-26,0.030000
2025-02-26,0.030000
2008-02-27,0.053000
2011-10-27,0.053000
2018-03-28,0.030000
2018-07-27,0.030000
2020-09-28,0.030000
2022-08-29,0.030000
2011-09-28,0.053000
2012-09-26,0.053000
2018-05-29,0.030000
2020-08-27,0.026000
2009-04-28,0.053000
2016-06-28,0.043000
2024-05-29,0.030000
2026-07-29,0.035000
2004-09-28,0.050000
2021-09-28,0.030000
2023-11-27,0.030000
2020-05-27,0.026000
2020-10-28,0.030000
2023-03-29,0.030000
2024-08-28,0.030000
2010-03-26,0.053000
2010-12-28,0.053000
2012-04-26,0.053000
2020-01-29,0.026000
2026-04-28,0.035000
2008-11-25,0.053000
2010-05-27,0.053000
2025-03-27,0.030000
2018-01-29,0.030000
2009-12-28,0.053000
2010-08-27,0.053000
2014-10-29,0.048000
2017-11-28,0.043000
2009-02-25,0.053000
2009-05-27,0.053000
2014-11-25,0.048000
2015-09-28,0.048000
2004-05-28,0.050000
2004-10-27,0.050000
2005-02-28,0.050000
2007-12-26,0.053000
2016-01-27,0.048000
2017-01-27,0.043000
2021-11-26,0.030000
2012-11-28,0.053000
2019-01-29,0.026000
2022-03-29,0.030000
2025-04-28,0.030000
2019-10-29,0.026000
2015-04-28,0.048000
2016-08-29,0.043000
2019-03-27,0.026000
2019-08-28,0.026000
2009-03-27,0.053000
2015-02-25,0.048000
2016-12-27,0.043000
2022-02-24,0.030000
2008-03-26,0.053000
2012-10-31,0.053000
2017-06-28,0.033000
2023-07-27,0.030000
2012-07-27,0.053000
2017-09-27,0.033000
2022-01-27,0.030000
2025-07-29,0.030000
2017-02-24,0.033000
2017-10-27,0.033000
2022-05-26,0.030000
2023-05-26,0.030000
2004-07-28,0.050000
2009-09-28,0.053000
2010-10-27,0.053000
2016-02-25,0.048000
2025-11-25,0.035000
2022-09-28,0.030000
2025-06-26,0.030000
2011-04-27,0.053000
2011-12-27,0.053000
2015-12-28,0.047000
2016-11-25,0.043000
2016-05-26,0.043000
2017-03-29,0.033000
2017-07-27,0.033000
2019-09-26,0.026000
2006-10-26,0.050000
2008-10-29,0.053000
2015-03-26,0.048000
2015-06-26,0.048000
2026-01-28,0.035000
2017-12-26,0.019000
2024-11-26,0.030000
2023-01-27,0.030000
2024-02-27,0.030000
2024-06-26,0.030000
2008-12-26,0.053000
2009-10-28,0.053000
2010-01-27,0.053000
2019-05-28,0.026000
2022-11-28,0.030000
2024-12-27,0.030000
2025-12-29,0.035000
2007-05-25,0.052000
2010-07-28,0.053000
2015-10-28,0.048000
2018-09-26,0.030000
2026-06-26,0.035000
2006-12-26,0.078000
2019-04-26,0.026000
2021-06-28,0.030000
2023-10-27,0.030000
2019-06-26,0.026000
2021-02-24,0.030000
2021-08-27,0.030000
2022-07-27,0.030000
2006-11-24,0.050000
2007-06-26,0.053000
2007-07-25,0.053000
2015-05-27,0.048000
2025-10-29,0.035000
2022-10-25,0.030000
2024-09-26,0.030000
2024-10-29,0.030000
2025-08-27,0.030000
2020-06-26,0.026000
2022-04-27,0.030000
2023-02-24,0.030000
2023-12-27,0.030000
2004-04-30,0.050000
2016-07-27,0.043000
2018-06-27,0.030000
2018-11-28,0.028000
2025-01-29,0.030000
2026-05-27,0.035000
2026-03-27,0.035000
2016-09-28,0.043000
2019-11-26,0.026000
2023-08-29,0.030000
2024-04-26,0.030000
2020-07-29,0.026000
2021-10-27,0.030000
2007-09-25,0.053000
2007-11-27,0.053000
2010-11-26,0.053000
2018-08-28,0.030000
2015-07-29,0.048000
2016-10-27,0.043000
2024-01-29,0.030000
2025-05-28,0.030000
2016-03-29,0.043000
2020-03-27,0.026000
2020-04-28,0.026000
2004-11-29,0.050000
2008-04-28,0.053000
2009-08-27,0.053000
2015-11-25,0.048000