f/overrides/event-backup/alvix-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
2005-09-13,0.023000
2007-03-13,0.029000
2017-06-20,0.037000
2017-12-12,0.380000
2018-09-18,0.042000
2023-03-21,0.034000
2010-06-15,0.018000
2016-03-15,0.020000
2024-06-18,0.064000
2025-09-23,0.048000
2011-03-22,0.019000
2014-03-11,0.020000
2003-12-31,0.023000
2007-06-12,0.035000
2011-09-20,0.027000
2015-06-09,0.031000
2017-12-26,0.033000
2021-12-21,2.056000
2006-09-12,0.030000
2012-12-26,0.036000
2015-12-28,0.042000
2025-12-16,1.171000
2023-09-19,0.045000
2004-06-15,0.022000
2004-09-14,0.027000
2008-09-16,0.037000
2009-06-16,0.023000
2020-12-22,0.119000
2024-12-17,0.814000
2006-03-14,0.030000
2013-06-11,0.033000
2018-12-20,0.051000
2021-09-21,0.049000
2008-12-29,0.038000
2014-09-09,0.026000
2000-12-08,0.019000
2003-03-18,0.016000
2005-12-06,0.154000
2010-12-28,0.020000
2015-09-08,0.029000
2020-06-16,0.050000
2006-06-13,0.030000
2012-09-18,0.029000
2007-12-11,0.212000
2013-12-23,0.036000
2019-03-19,0.036000
2011-06-14,0.023000
2013-03-12,0.021000
2025-03-25,0.040000
2026-06-09,0.034000
1999-12-10,0.019000
2003-09-16,0.021000
2004-12-28,0.033000
2012-06-12,0.035000
2003-06-17,0.020000
2009-09-15,0.021000
2016-09-20,0.037000
2024-03-19,0.043000
2010-03-23,0.025000
2022-06-21,0.042000
2006-12-12,0.062000
2017-09-19,0.079000
2018-12-11,0.398000
2021-06-22,0.060000
2005-06-14,0.025000
2011-12-27,0.032000
2009-03-17,0.032000
2012-03-13,0.018000
2013-09-10,0.034000
2006-12-27,0.042000
2016-12-27,0.074000
2018-03-20,0.048000
2018-06-19,0.052000
2022-03-22,0.582000
2024-09-17,0.051000
2000-06-30,0.021000
2004-12-07,0.020000
2007-09-11,0.035000
2007-12-28,0.043000
2009-12-29,0.022000
2019-09-17,0.043000
2023-12-19,0.225000
2008-06-17,0.033000
2020-03-10,0.032000
2020-09-22,0.042000
2005-03-15,0.025000
2017-03-21,0.032000
2022-12-21,0.537000
2010-09-21,0.024000
2000-03-31,0.018000
2004-03-16,0.016000
2014-06-10,0.039000
2019-12-20,0.136000
2023-06-20,0.056000
2025-06-24,0.049000
2026-03-10,0.016000
1999-09-24,0.012000
2008-12-09,0.079000
2018-12-31,0.051000
2000-09-29,0.018000
2008-03-18,0.035000
2014-12-23,0.035000
2016-06-21,0.042000
2019-06-18,0.056000
2022-09-20,0.051000
2005-12-28,0.034000
2015-03-10,0.012000
2021-03-23,0.038000