f/overrides/event-backup/avedx-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
2020-03-31,0.050000
2021-09-30,0.045000
2010-03-31,0.054000
2006-03-31,0.020000
2012-03-30,0.047000
2014-06-30,0.043000
2017-03-31,0.041000
2017-09-29,0.051000
2019-12-30,1.335000
2021-03-31,0.051000
2005-06-30,0.020000
2023-03-31,0.055000
2022-06-30,0.093000
2011-12-29,0.286000
2020-06-30,0.060000
2021-12-30,2.165000
2025-03-31,0.048000
2010-06-30,0.034000
2009-03-31,0.037000
2024-09-30,0.065000
2006-06-30,0.030000
2022-12-29,1.320000
2025-06-30,0.051000
2016-12-29,0.994000
2012-09-28,0.051000
2015-03-31,0.061000
2019-09-30,0.063000
2026-03-31,0.049000
2012-06-29,0.050000
2019-06-28,0.063000
2021-06-30,0.047000
2025-09-30,0.046000
2026-06-30,0.059000
2011-09-30,0.042000
2013-03-28,0.023000
2014-09-30,0.048000
2015-06-30,0.048000
2018-06-29,0.054000
2009-09-30,0.026000
2008-09-30,0.031000
2016-09-30,0.061000
2018-03-29,0.057000
2024-06-28,0.058000
2007-03-29,0.034000
2007-09-28,0.035000
2014-12-30,1.354000
2023-12-28,0.422000
2025-12-30,1.041000
2006-12-28,0.046000
2008-03-31,0.037000
2008-12-30,0.043000
2013-06-28,0.044000
2014-03-31,0.033000
2016-03-31,0.064000
2018-12-28,1.550000
2019-03-29,0.039000
2007-12-28,0.048000
2022-03-31,0.047000
2011-03-31,0.038000
2012-12-28,0.786000
2013-09-30,0.043000
2020-09-30,0.050000
2020-12-30,0.343000
2008-06-30,0.035000
2010-09-30,0.044000
2013-12-30,0.368000
2017-06-30,0.047000
2009-12-30,0.029000
2007-06-29,0.040000
2015-12-30,0.934000
2016-06-30,0.049000
2018-09-28,0.062000
2022-09-30,0.068000
2006-09-29,0.040000
2017-12-28,1.026000
2023-09-29,0.053000
2024-03-28,0.054000
2024-12-30,1.286000
2010-12-30,0.040000
2005-12-29,0.027000
2009-06-30,0.039000
2011-06-30,0.044000
2015-09-30,0.066000
2023-06-30,0.062000
2005-09-30,0.030000