f/overrides/event-backup/dim-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
2013-03-22,0.233000
2014-03-24,0.279000
2015-03-23,0.097000
2016-12-23,0.309000
2021-06-24,1.105000
2025-06-25,1.465000
2017-06-26,0.895000
2018-12-24,0.365000
2019-12-23,0.385000
2022-06-24,1.280000
2022-09-26,0.300000
2024-09-25,0.365000
2025-09-25,0.500000
2009-09-21,0.252000
2018-03-20,0.100000
2021-03-25,0.069000
2023-06-26,1.415000
2023-09-25,0.330000
2025-03-26,0.190000
2011-12-21,0.252000
2012-09-24,0.328000
2018-06-25,1.041000
2022-03-25,0.095000
2024-06-25,1.135000
2007-12-17,2.055000
2010-12-22,0.148000
2011-03-21,0.324000
2014-06-23,1.052000
2014-12-19,0.265000
2021-12-27,0.431000
2009-12-21,0.101000
2011-06-22,1.001000
2016-06-20,0.865000
2019-06-24,1.060000
2020-12-21,0.401000
2010-03-29,0.175000
2011-09-26,0.356000
2012-03-26,0.191000
2016-09-26,0.295000
2019-03-26,0.210000
2010-09-20,0.272000
2014-09-22,0.326000
2020-09-22,0.485000
2012-12-24,0.136000
2015-09-21,0.338000
2009-06-22,0.861000
2010-06-28,0.866000
2013-09-23,0.342000
2020-06-23,0.575000
2023-12-22,0.625000
2006-12-21,0.376000
2017-09-26,0.410000
2019-09-24,0.485000
2024-12-31,0.086000
2026-03-26,0.060000
2013-12-24,0.079000
2021-09-24,0.850000
2015-06-22,0.835000
2015-12-21,0.291000
2017-12-26,0.360000
2018-09-25,0.355000
2024-03-22,0.110000
2025-12-26,0.427000
2013-06-24,1.181000
2023-03-27,0.440000
2024-12-26,0.480000
2009-03-23,0.039000
2012-06-25,0.828000
2017-03-27,0.105000
2026-06-25,1.630000
2008-12-22,2.192000
2016-03-21,0.160000
2020-03-24,0.148000
2022-12-23,0.520000