f/overrides/event-backup/dfeox-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
2010-12-08,0.059000
2019-06-27,0.097000
2010-06-08,0.032000
2010-09-08,0.039000
2015-09-09,0.073000
2016-09-29,0.067000
2018-03-28,0.046000
2021-09-29,0.121000
2008-10-27,0.028000
2009-12-08,0.031000
2022-12-12,0.853000
2014-12-15,0.173000
2018-09-27,0.095000
2007-06-08,0.045000
2011-03-08,0.023000
2014-06-09,0.064000
2018-12-17,0.258000
2022-06-29,0.124000
2009-03-10,0.031000
2013-09-10,0.060000
2016-06-29,0.077000
2009-10-26,0.017000
2015-06-08,0.071000
2011-06-08,0.038000
2012-06-08,0.053000
2015-12-15,0.307000
2023-06-29,0.129000
2025-09-29,0.140000
2009-06-09,0.035000
2009-09-09,0.032000
2016-03-30,0.081000
2017-03-30,0.074000
2017-06-29,0.082000
2021-06-29,0.103000
2007-09-10,0.043000
2012-03-08,0.023000
2008-09-09,0.044000
2011-09-08,0.040000
2011-12-12,0.068000
2025-06-27,0.140000
2006-06-08,0.032000
2007-03-08,0.026000
2020-09-29,0.095000
2024-09-27,0.130000
2024-12-10,0.110000
2026-03-30,0.136000
2007-12-19,0.018000
2012-12-12,0.094000
2008-12-09,0.037000
2022-09-29,0.125000
2019-03-28,0.084000
2022-03-30,0.113000
2023-03-30,0.115000
2024-03-27,0.121000
2013-06-10,0.056000
2018-06-28,0.087000
2013-12-11,0.151000
2014-03-10,0.045000
2016-12-14,0.192000
2017-12-14,0.244000
2023-09-28,0.124000
2005-12-19,0.054000
2012-09-10,0.051000
2017-09-28,0.085000
2019-09-27,0.102000
2020-03-30,0.107000
2026-06-29,0.152000
2008-06-10,0.042000
2013-03-08,0.033000
2010-03-09,0.021000
2024-06-27,0.126000
2025-03-28,0.130000
2006-03-08,0.015000
2006-11-27,0.038000
2025-12-10,0.114000
2020-06-29,0.102000
2020-12-14,0.100000
2007-11-26,0.041000
2008-03-10,0.032000
2014-09-09,0.063000
2015-03-09,0.060000
2019-12-16,0.500000
2021-03-30,0.099000
2006-09-08,0.031000
2006-12-18,0.050000
2021-12-13,1.020000
2023-12-11,0.149000