f/overrides/event-backup/dol-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
2014-12-19,0.377000
2021-09-24,0.490000
2010-06-28,0.838000
2011-12-21,0.286000
2018-03-20,0.189000
2011-03-21,0.205000
2012-06-25,0.792000
2016-12-23,0.331000
2019-03-26,0.310000
2006-12-21,0.302000
2009-06-22,0.981000
2009-12-21,0.236000
2019-06-24,0.810000
2020-03-24,0.189000
2021-03-25,0.332000
2015-03-23,0.258000
2017-03-27,0.235000
2017-12-26,0.326000
2022-06-24,1.015000
2024-12-31,0.008000
2013-03-22,0.229000
2013-09-23,0.294000
2015-09-21,0.263000
2020-12-21,0.320000
2022-12-23,0.224000
2023-09-25,0.315000
2011-06-22,1.066000
2013-12-24,0.337000
2018-09-25,0.283000
2017-09-26,0.290000
2019-12-23,0.321000
2023-06-26,0.900000
2009-09-21,0.230000
2012-09-24,0.231000
2016-06-20,0.770000
2023-03-27,0.445000
2014-03-24,0.800000
2017-06-26,0.755000
2019-09-24,0.275000
2015-12-21,0.278000
2025-06-25,0.985000
2026-03-26,0.205000
2012-03-26,0.223000
2014-09-22,0.287000
2020-09-22,0.345000
2025-03-26,0.230000
2021-06-24,0.595000
2021-12-27,0.353000
2024-09-25,0.245000
2025-09-25,0.265000
2026-06-25,1.000000
2016-09-26,0.210000
2022-09-26,0.360000
2025-12-26,0.380000
2018-06-25,0.939000
2018-12-24,0.301000
2022-03-25,0.370000
2024-03-22,0.310000
2010-03-29,0.198000
2010-12-22,0.317000
2015-06-22,0.780000
2014-06-23,0.880000
2024-06-25,0.980000
2007-12-17,1.379000
2011-09-26,0.329000
2013-06-24,0.803000
2012-12-24,0.297000
2016-03-21,0.222000
2020-06-23,0.440000
2023-12-22,0.320000
2024-12-26,0.326000
2008-12-22,2.356000
2009-03-23,0.060000
2010-09-20,0.226000