f/overrides/event-backup/grmix-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
2008-03-20,0.052000
2022-09-12,0.069000
2003-03-21,0.027000
2008-12-19,0.060000
2013-03-15,0.047000
2013-06-21,0.032000
2020-09-08,0.063000
2022-03-07,0.033000
2011-06-17,0.047000
2015-12-17,1.488000
2020-03-09,0.046000
2021-03-08,0.022000
2002-09-20,0.028000
2005-12-28,0.126000
2010-09-17,0.038000
2025-12-18,1.434000
2000-12-18,0.200000
2005-06-24,0.040000
2007-03-23,0.058000
2012-06-15,0.096000
2014-09-16,0.052000
2016-03-11,0.051000
2021-09-07,0.060000
2000-06-27,0.027000
2011-03-18,0.035000
2011-09-16,0.049000
2001-03-28,0.025000
2002-03-22,0.025000
2002-06-21,0.026000
2019-03-08,0.041000
2024-06-10,0.074000
2007-09-21,0.058000
2018-12-18,2.148000
2003-06-20,0.027000
2008-06-20,0.045000
2010-03-19,0.016000
2016-06-10,0.048000
2018-09-10,0.074000
2023-03-13,0.047000
2012-09-07,0.049000
2015-06-12,0.069000
2017-12-18,0.968000
2012-12-19,0.203000
2015-03-13,0.056000
2016-09-12,0.035000
2020-12-21,0.099000
2024-09-09,0.080000
2007-12-21,0.062000
2014-03-14,0.031000
2017-09-11,0.038000
2020-12-29,0.007000
2002-12-27,0.033000
2004-09-24,0.034000
2006-03-24,0.044000
2009-09-18,0.036000
2014-02-13,0.018000
2017-06-09,0.064000
2018-03-09,0.042000
2003-09-11,0.027000
2009-03-20,0.043000
2019-06-07,0.082000
2019-09-09,0.069000
2006-09-22,0.048000
2025-06-09,0.082000
2013-09-20,0.049000
2018-12-19,0.145000
2020-06-08,0.065000
2008-09-19,0.055000
2010-06-18,0.029000
2022-06-06,0.068000
2023-09-11,0.069000
2015-09-10,0.061000
2022-12-21,0.187000
2025-09-08,0.076000
2007-06-22,0.051000
2018-06-08,0.070000
2014-06-13,0.032000
2001-06-27,0.025000
2001-12-20,0.031000
2003-12-26,0.040000
2021-06-07,0.065000
2001-09-26,0.029000
2006-06-23,0.045000
2006-12-27,0.107000
2026-06-17,0.088000
2005-09-23,0.046000
2017-03-10,0.042000
2021-12-21,1.039000
2023-12-20,0.141000
2025-03-10,0.042000
2026-03-18,0.053000
2010-12-27,0.096000
2014-12-16,0.725000
2004-12-28,0.071000
2009-06-19,0.038000
2004-06-25,0.032000
2005-03-24,0.037000
2011-12-19,0.139000
2013-12-18,1.212000
2000-03-28,0.029000
2004-03-26,0.029000
2009-12-18,0.065000
2019-12-18,0.853000
2024-12-19,0.590000
2016-12-16,0.954000
2023-06-12,0.074000
2024-03-11,0.044000