f/overrides/event-backup/famex-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
1999-09-29,0.064000
2011-12-29,0.063000
2020-09-29,0.015000
2008-09-29,0.110000
2009-03-30,0.042000
1997-12-30,0.056000
1998-09-29,0.068000
1999-06-29,0.066000
2024-12-27,1.795000
2003-12-30,0.212000
1997-09-26,0.065000
2014-09-29,0.065000
2018-06-28,0.080000
2023-06-29,0.052000
2023-09-28,0.044000
2003-03-28,0.034000
2005-03-30,0.027000
2004-03-30,0.025000
2007-06-28,0.102000
2009-06-29,0.030000
2016-09-29,0.057000
2019-03-28,0.044000
2021-12-28,0.699000
2026-06-26,0.015000
1996-09-27,0.061000
2011-09-29,0.067000
2022-12-29,0.589000
2025-06-27,0.010000
2001-06-28,0.054000
2007-12-27,1.592000
1999-12-15,0.073000
2008-03-27,0.045000
2015-06-29,0.066000
1998-12-29,0.054000
1999-03-30,0.070000
2014-06-27,0.065000
2019-06-27,0.058000
2023-12-28,0.236000
2025-09-29,0.016000
2007-03-29,0.019000
2012-03-29,0.065000
2018-12-27,0.220000
2003-09-29,0.025000
2005-06-29,0.035000
2013-09-27,0.059000
2020-12-29,0.844000
2002-09-27,0.029000
2006-12-28,1.206000
2016-06-29,0.068000
2023-03-29,0.025000
2000-09-28,0.059000
2006-03-29,0.033000
2016-12-29,2.169000
2020-03-30,0.035000
2020-06-29,0.028000
2022-03-29,0.011000
2022-09-29,0.011000
2000-03-30,0.085000
2009-12-29,0.060000
2013-12-27,1.095000
2016-03-30,0.075000
2024-09-27,0.017000
1996-06-27,0.056000
2004-09-29,0.033000
2007-09-27,0.038000
2024-03-27,0.016000
2024-06-27,0.023000
2001-03-29,0.068000
2010-09-29,0.180000
1996-12-27,0.077000
2000-12-15,0.205000
2003-06-27,0.033000
2006-06-29,0.047000
2008-12-30,0.049000
2010-06-29,0.047000
2015-03-30,0.060000
2017-09-28,0.041000
2001-12-27,0.026000
2005-12-29,0.030000
2012-12-28,1.237000
2014-12-30,0.997000
2002-12-27,0.548000
2014-03-28,0.058000
2015-09-29,0.069000
2021-09-29,0.015000
1997-03-27,0.071000
1998-03-30,0.074000
2011-03-31,0.046000
2015-12-29,1.057000
2010-12-29,0.060000
2012-09-28,0.060000
2013-03-28,0.050000
2013-06-27,0.064000
2005-09-29,0.042000
2017-06-29,0.047000
2018-03-28,0.055000
2018-09-28,0.046000
2002-03-27,0.032000
2017-03-30,0.060000
2019-09-27,0.042000
2025-03-27,0.008000
1998-06-29,0.082000
2001-09-27,0.045000
2012-06-29,0.060000
2019-12-27,0.994000
1997-06-27,0.077000
2000-06-29,0.063000
2004-06-29,0.070000
2004-12-29,0.216000
2026-03-27,0.007000
2008-06-27,0.042000
2017-12-28,0.064000
2006-09-28,0.040000
2009-09-29,0.036000
2010-03-30,0.073000
2011-06-29,0.103000
2025-12-30,2.005000