f/overrides/event-backup/dnl-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
2024-12-26,0.136000
2014-03-24,0.115500
2015-03-23,0.040000
2016-03-21,0.047500
2016-06-20,0.242500
2018-03-20,0.039000
2021-12-27,0.002000
2022-03-25,0.370000
2013-09-23,0.137000
2014-09-22,0.149500
2017-09-26,0.240000
2018-09-25,0.135000
2008-12-22,0.519500
2010-06-28,0.187000
2019-03-26,0.037500
2026-03-26,0.020000
2026-06-25,0.170000
2010-03-29,0.240000
2011-09-26,0.201500
2013-03-22,0.070000
2013-06-24,0.323000
2017-03-27,0.075000
2023-12-22,0.105000
2025-09-25,0.170000
2013-12-24,0.054500
2014-12-19,0.070000
2015-06-22,0.239500
2017-06-26,0.167500
2025-12-26,0.234000
2009-09-21,0.333000
2014-06-23,0.252500
2022-09-26,0.405000
2025-03-26,0.115000
2006-12-21,0.170000
2009-06-22,0.252500
2012-09-24,0.222500
2015-09-21,0.155500
2020-09-22,0.235000
2022-06-24,0.655000
2024-03-22,0.165000
2009-12-21,0.100500
2024-09-25,0.155000
2015-12-21,0.013500
2016-09-26,0.197500
2021-06-24,0.200000
2023-03-27,0.160000
2023-06-26,0.290000
2012-06-25,0.286000
2019-09-24,0.140000
2007-12-17,0.490500
2010-09-20,0.146000
2020-03-24,0.122500
2021-03-25,0.157000
2010-12-22,0.129500
2011-06-22,0.257000
2011-12-21,0.095000
2019-06-24,0.277500
2021-09-24,0.240000
2023-09-25,0.115000
2012-03-26,0.102500
2020-06-23,0.150000
2025-06-25,0.330000
2018-12-24,0.133500
2019-12-23,0.179000
2020-12-21,0.162500
2024-06-25,0.285000
2024-12-31,0.086000
2011-03-21,0.187000
2012-12-24,0.105000
2016-12-23,0.091000
2017-12-26,0.067000
2018-06-25,0.321500
2022-12-23,0.124000