f/overrides/event-backup/edd-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
2018-03-28,0.150000
2018-09-27,0.150000
2023-09-28,0.090000
2025-03-31,0.160000
2025-12-19,0.130000
2011-03-29,0.300000
2012-06-27,0.300000
2014-03-27,0.250000
2016-12-21,0.180000
2020-06-29,0.100000
2008-03-27,0.500000
2012-03-28,0.300000
2016-06-28,0.180000
2008-09-26,0.500000
2024-06-28,0.135000
2011-09-28,0.300000
2014-09-26,0.250000
2022-03-30,0.090000
2015-03-27,0.220000
2015-06-26,0.220000
2021-09-29,0.095000
2010-09-28,0.300000
2011-06-28,0.300000
2013-06-26,0.250000
2019-03-28,0.150000
2019-09-27,0.140000
2020-09-29,0.110000
2021-12-16,0.095000
2024-03-27,0.090000
2009-09-28,0.250000
2012-09-26,0.250000
2016-03-29,0.200000
2017-12-21,0.150000
2018-12-20,0.150000
2020-03-30,0.120000
2022-09-29,0.070000
2024-12-13,0.160000
2007-11-28,0.500000
2010-06-28,0.300000
2016-09-28,0.180000
2025-06-30,0.120000
2007-08-29,0.600000
2018-06-28,0.150000
2021-06-29,0.095000
2015-12-16,0.200000
2009-12-22,0.300000
2011-12-21,0.300000
2012-12-19,0.250000
2020-12-17,0.105000
2023-03-30,0.080000
2023-12-14,0.090000
2026-06-30,0.240000
2017-09-28,0.150000
2019-06-27,0.150000
2019-12-19,0.130000
2007-12-27,0.484000
2013-09-26,0.250000
2024-09-30,0.135000
2017-03-29,0.170000
2023-06-29,0.080000
2026-03-31,0.140000
2008-12-17,0.500000
2010-12-21,0.300000
2013-03-26,0.250000
2022-06-29,0.070000
2025-09-30,0.120000
2009-06-26,0.250000
2014-06-26,0.250000
2021-03-30,0.095000
2017-06-28,0.160000
2022-12-15,0.070000
2009-03-27,0.250000
2014-12-17,0.250000
2015-09-28,0.220000
2010-03-29,0.300000
2008-06-26,0.500000
2013-12-18,0.901000