f/overrides/event-backup/dffvx-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
2016-06-29,0.062000
2019-06-27,0.079000
2000-12-18,0.552000
2006-03-08,0.010000
2015-09-09,0.068000
2010-06-08,0.013000
2017-03-30,0.061000
2021-03-30,0.102000
2022-03-30,0.057000
2023-09-28,0.111000
2005-09-08,0.090000
2007-09-10,0.079000
2008-12-10,0.063000
2025-03-28,0.142000
2022-12-14,1.149000
2007-03-08,0.014000
2018-03-28,0.036000
2022-06-29,0.102000
2021-09-29,0.103000
2009-09-09,0.025000
2017-06-29,0.061000
2020-03-30,0.076000
2013-06-10,0.047000
2020-09-29,0.074000
2020-12-16,0.147000
2024-09-27,0.123000
2025-06-27,0.160000
2002-12-16,1.433000
2011-09-08,0.032000
2012-03-08,0.007000
2020-06-29,0.062000
2023-12-13,0.387000
2024-12-13,0.120000
2005-12-19,1.572000
2009-03-10,0.021000
2019-09-27,0.085000
2010-03-09,0.007000
2010-09-08,0.030000
2014-12-16,1.105000
2016-03-30,0.054000
2018-12-18,1.002000
2004-06-08,0.015000
2004-12-20,1.564000
2005-06-08,0.006000
2023-06-29,0.121000
2025-09-29,0.183000
2026-06-29,0.183000
2012-06-08,0.054000
2013-12-12,1.382000
2014-03-10,0.014000
2023-03-30,0.102000
2024-03-27,0.106000
2006-12-18,0.493000
2009-06-09,0.026000
2011-06-08,0.025000
2024-06-27,0.133000
2016-12-15,0.849000
2007-12-19,0.040000
2012-12-13,1.141000
2014-09-09,0.050000
2009-12-09,0.038000
2018-06-28,0.066000
2015-12-16,0.979000
2019-03-28,0.067000
2021-12-15,2.161000
2001-12-17,0.867000
2004-09-08,0.014000
2006-06-08,0.056000
2017-09-28,0.071000
2022-09-29,0.109000
2026-03-30,0.150000
2003-12-22,1.762000
2013-09-10,0.039000
2014-06-09,0.054000
2017-12-15,1.196000
2025-12-15,0.139000
2006-09-08,0.053000
2007-06-08,0.042000
2015-06-08,0.072000
2021-06-29,0.087000
2012-09-10,0.027000
2015-03-09,0.036000
2019-12-17,0.653000
2010-12-09,0.090000
2011-12-13,0.179000
2016-09-29,0.053000
2018-09-27,0.077000
2008-03-10,0.029000
2008-06-10,0.034000
2008-09-09,0.044000