f/overrides/event-backup/abuax-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
2008-06-27,0.040000
2009-09-25,0.059000
2017-03-28,0.030000
2024-12-20,0.350000
2025-12-19,0.117000
2006-09-27,0.053000
2009-12-22,0.070000
2011-09-26,0.051000
2014-03-28,0.025000
2007-06-26,0.053000
2009-06-25,0.048000
2014-12-22,0.562000
2016-06-28,0.291000
2019-06-26,0.202000
2007-03-27,0.044000
2013-09-26,0.032000
2015-12-22,0.440000
2020-09-28,0.038000
2020-12-21,0.173000
2021-09-28,0.048000
2022-12-21,0.066000
2025-06-26,0.323000
2004-03-23,0.005000
2008-12-22,0.091000
2012-09-27,0.033000
2026-06-26,0.400000
2005-03-24,0.020000
2008-03-28,0.075000
2010-03-23,0.064000
2010-12-21,0.118000
2011-03-25,0.064000
2016-03-28,0.033000
2017-06-27,0.268000
2019-03-27,0.035000
2006-12-21,0.544000
2021-03-29,0.056000
2021-06-28,0.858000
2023-06-28,0.227000
2020-03-27,0.033000
2013-06-26,0.153000
2017-09-27,0.034000
2018-03-27,0.027000
2019-09-26,0.048000
2006-03-28,0.068000
2019-12-20,0.388000
2022-03-29,0.029000
2022-06-28,0.409000
2022-09-28,0.031000
2026-03-27,0.066000
2016-12-22,0.133000
2006-06-27,0.051000
2011-06-24,0.051000
2021-12-22,0.566000
2024-06-26,0.076000
2004-09-23,0.024000
2023-12-21,0.091000
2016-09-27,0.027000
2005-06-27,0.041000
2005-09-28,0.039000
2015-03-27,0.038000
2023-09-27,0.055000
2004-06-23,0.011000
2018-12-21,0.300000
2025-09-26,0.055000
2008-09-26,0.044000
2007-12-20,0.774000
2009-03-26,0.076000
2011-12-21,0.089000
2013-03-26,0.063000
2015-09-28,0.026000
2018-09-26,0.038000
2024-03-26,0.065000
2004-12-23,0.132000
2014-06-26,0.696000
2018-06-27,0.412000
2024-09-26,0.055000
2025-03-27,0.040000
2010-09-23,0.044000
2012-06-27,0.049000
2012-12-21,0.149000
2015-06-26,0.360000
2023-03-29,0.042000
2012-03-27,0.063000
2007-09-25,0.070000
2010-06-22,0.044000
2013-12-23,0.423000
2014-09-29,0.023000
2017-12-21,0.424000
2020-06-26,0.377000
2005-12-23,0.306000