f/overrides/event-backup/davpx-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
2011-12-15,0.033000
2014-12-02,0.534000
2015-06-15,0.412000
2023-12-26,0.046000
2025-12-04,0.957000
2007-09-14,0.025000
2008-12-15,0.324000
2017-12-04,0.123000
2006-12-29,0.024000
2015-03-13,0.014000
2007-12-14,1.477000
2017-03-15,0.010000
2019-09-16,0.022000
2019-12-05,0.380000
2003-03-31,0.010000
2006-09-29,0.028000
2013-09-13,0.035000
2016-03-15,0.015000
2018-12-27,0.031000
2004-06-30,0.006000
2005-12-30,0.039000
2010-03-15,0.018000
2011-06-15,0.022000
2015-12-02,0.304000
2016-12-02,0.324000
2017-09-15,0.021000
2022-03-15,0.005000
2005-06-30,0.010000
2009-06-15,0.024000
2023-03-15,0.044000
2023-09-15,0.013000
2010-09-15,0.015000
2014-12-29,0.032000
2015-09-15,0.015000
2021-06-15,1.234000
2022-09-15,0.054000
2005-09-30,0.013000
2007-06-15,0.027000
2006-03-31,0.265000
2013-03-15,0.022000
2016-09-15,0.013000
2019-12-27,0.043000
2021-12-03,1.543000
2003-06-30,0.010000
2005-03-31,0.015000
2020-12-04,0.253000
2009-12-15,0.019000
2012-03-15,0.017000
2011-09-15,0.018000
2020-09-15,0.011000
2020-12-28,0.022000
2026-06-15,1.044000
2003-12-31,0.010000
2010-12-15,0.017000
2006-10-31,0.520000
2008-06-16,0.025000
2008-09-15,0.028000
2011-03-15,0.009000
2014-03-14,0.020000
2017-12-27,0.034000
2003-09-30,0.010000
2006-06-30,0.018000
2022-06-15,1.125000
2024-09-16,0.012000
2018-09-17,0.013000
2019-03-15,0.015000
2019-06-14,0.145000
2023-12-04,1.003000
2024-06-14,0.930000
2025-12-26,0.001000
2004-09-30,0.007000
2012-06-15,0.036000
2009-09-15,0.018000
2015-12-29,0.039000
2023-06-15,0.887000
2004-12-31,0.042000
2008-03-14,0.025000
2012-09-14,0.018000
2012-12-14,0.033000
2020-06-15,0.040000
2024-12-04,1.027000
2025-03-14,0.015000
2004-03-31,0.009000
2010-06-15,0.030000
2017-06-15,0.387000
2026-03-16,0.008000
2009-03-13,0.028000
2016-06-15,0.281000
2014-09-15,0.015000
2018-12-06,0.178000
2024-03-15,0.014000
2025-06-16,0.719000
2007-03-15,0.029000
2014-06-13,0.978000
2016-12-28,0.038000
2018-06-15,0.819000
2020-03-16,0.026000
2022-12-27,0.050000
2013-06-14,0.149000
2013-12-13,0.756000