f/overrides/event-backup/iautx-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
2025-08-21,0.029000
2009-06-19,0.093000
2010-09-16,0.093000
2018-03-22,0.040000
2022-08-18,0.035000
2023-05-18,0.040000
2025-01-16,0.034000
2010-06-17,0.093000
2020-09-17,0.039000
2021-09-23,0.039000
2014-06-19,0.035000
2018-12-14,1.758000
2020-02-20,0.044000
2021-10-21,0.039000
2023-01-19,0.040000
2008-09-18,0.089000
2009-09-18,0.080000
2013-12-13,0.272000
2023-03-23,0.040000
2019-10-17,0.048000
2023-02-16,0.040000
2023-07-20,0.045000
2026-01-15,0.031000
2013-07-18,0.041000
2016-09-15,0.034000
2017-01-19,0.034000
2018-06-21,0.048000
2020-08-20,0.039000
2021-07-15,0.039000
2003-12-12,0.018000
2013-04-18,0.041000
2018-01-18,0.040000
2023-11-16,0.045000
2014-08-21,0.035000
2018-08-16,0.051000
2019-11-21,0.044000
2022-03-24,0.039000
2023-06-22,0.040000
2007-12-14,0.075000
2018-02-15,0.040000
2019-01-17,0.052000
2014-01-16,0.038000
2014-07-17,0.035000
2014-09-18,0.035000
2016-05-19,0.034000
2019-07-18,0.051000
2003-06-30,0.063000
2012-12-07,0.124000
2013-02-27,1.101000
2020-03-19,0.044000
2020-07-16,0.045000
2020-01-16,0.044000
2021-01-21,0.039000
2006-06-20,0.113000
2012-09-20,0.124000
2014-05-15,0.034000
2016-12-13,0.194000
2017-11-16,0.080000
2018-07-19,0.048000
2020-06-18,0.044000
2024-06-27,0.036000
2007-09-20,0.065000
2011-09-15,0.104000
2015-06-18,0.035000
2025-02-20,0.034000
2026-07-16,0.030000
2016-07-21,0.034000
2017-04-20,0.034000
2018-11-15,0.052000
2020-05-21,0.045000
2024-08-15,0.036000
2009-03-20,0.089000
2011-06-16,0.099000
2016-03-17,0.035000
2026-02-19,0.031000
2014-04-17,0.034000
2016-01-21,0.035000
2025-12-11,2.853000
2021-05-20,0.039000
2023-08-17,0.045000
2024-01-18,0.040000
2024-12-12,1.484000
2026-06-25,0.030000
2017-09-14,0.040000
2018-10-18,0.051000
2019-04-18,0.051000
2008-06-18,0.089000
2014-03-20,0.034000
2015-08-20,0.035000
2016-02-18,0.035000
2016-06-16,0.034000
2003-11-20,0.042000
2004-09-20,0.091000
2008-03-18,0.074000
2022-09-22,0.035000
2025-10-16,0.032000
2018-05-17,0.044000
2020-11-19,0.039000
2022-05-19,0.035000
2007-06-20,0.096000
2015-09-17,0.035000
2019-02-21,0.051000
2019-06-20,0.051000
2023-04-20,0.040000
2024-05-16,0.040000
2007-03-20,0.061000
2014-11-20,0.035000
2015-01-22,0.035000
2025-07-17,0.029000
2026-03-26,0.031000
2017-05-18,0.034000
2017-12-13,0.644000
2021-02-18,0.039000
2022-12-14,1.010000
2025-09-25,0.029000
2004-06-18,0.061000
2005-09-19,0.089000
2016-11-17,0.034000
2021-04-15,0.039000
2022-04-21,0.039000
2026-04-16,0.031000
2010-03-18,0.073000
2019-12-13,0.256000
2020-04-16,0.044000
2013-08-15,0.041000
2014-12-12,0.246000
2016-04-21,0.035000
2017-08-17,0.038000
2022-06-23,0.035000
2004-12-17,0.089000
2005-06-20,0.079000
2012-06-14,0.104000
2023-12-13,0.929000
2025-11-20,0.031000
2026-05-21,0.030000
2019-05-16,0.051000
2021-06-24,0.039000
2023-09-28,0.045000
2023-10-19,0.045000
2003-09-30,0.060000
2006-09-20,0.071000
2015-07-16,0.035000
2015-11-19,0.035000
2021-11-18,0.039000
2022-07-21,0.035000
2018-04-19,0.044000
2022-11-17,0.035000
2019-08-15,0.048000
2002-12-31,0.076000
2003-03-31,0.067000
2005-12-16,0.058000
2014-10-16,0.035000
2017-07-20,0.038000
2015-03-19,0.035000
2015-10-15,0.035000
2017-02-16,0.034000
2024-04-18,0.040000
2024-10-17,0.034000
2005-03-18,0.064000
2011-12-09,0.104000
2013-03-21,0.124000
2015-04-16,0.035000
2016-10-21,0.034000
2017-10-19,0.040000
2022-10-20,0.035000
2024-03-28,0.040000
2004-03-19,0.048000
2006-12-15,0.069000
2013-11-21,0.041000
2021-12-14,1.250000
2015-02-19,0.035000
2015-05-21,0.035000
2020-12-11,0.039000
2016-08-18,0.034000
2020-10-15,0.039000
2006-03-20,0.062000
2009-12-11,0.099000
2013-06-20,0.041000
2015-12-11,0.504000
2024-07-18,0.036000
2024-11-21,0.034000
2002-09-30,0.090000
2008-12-12,0.111000
2013-05-16,0.041000
2022-01-20,0.039000
2024-02-15,0.040000
2013-09-19,0.041000
2014-02-20,0.038000
2017-03-16,0.034000
2019-03-21,0.051000
2019-09-19,0.048000
2021-08-19,0.039000
2022-02-17,0.039000
2025-03-27,0.034000
2011-03-17,0.094000
2013-10-17,0.041000
2018-09-13,0.051000
2025-04-17,0.013000
2021-03-25,0.039000
2024-09-26,0.034000
2025-05-15,0.030000
2025-06-26,0.029000
2010-12-03,0.094000
2012-03-15,0.104000
2017-06-15,0.038000