f/overrides/event-backup/abdax-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
2017-06-27,0.033000
2017-12-21,0.103000
2018-03-27,0.033000
2021-09-28,0.026000
2006-06-27,0.071000
2006-09-27,0.077000
2009-03-26,0.024000
2013-09-26,0.034000
2006-12-21,0.300000
2021-03-29,0.033000
2021-06-28,0.349000
2024-12-20,0.078000
2004-03-23,0.003000
2011-06-24,0.059000
2013-03-26,0.149000
2014-12-22,0.302000
2012-09-27,0.044000
2012-12-21,0.317000
2015-12-22,0.178000
2020-06-26,0.150000
2005-12-23,0.223000
2008-12-22,0.144000
2010-06-22,0.047000
2012-06-27,0.059000
2025-12-19,0.097000
2015-06-26,0.113000
2017-03-28,0.054000
2024-09-26,0.070000
2025-06-26,0.077000
2005-09-28,0.058000
2014-03-28,0.033000
2018-12-21,0.170000
2024-06-26,0.080000
2007-12-20,0.582000
2019-09-26,0.054000
2022-09-28,0.037000
2023-06-28,0.069000
2020-03-27,0.033000
2004-09-23,0.031000
2006-03-29,0.067000
2009-06-25,0.054000
2019-03-27,0.034000
2007-06-26,0.076000
2010-03-23,0.034000
2013-06-26,0.029000
2020-09-28,0.032000
2023-03-29,0.061000
2011-03-25,0.034000
2014-06-26,0.406000
2016-06-28,0.114000
2021-12-22,0.293000
2023-09-27,0.059000
2026-03-27,0.079000
2004-12-23,0.082000
2007-03-27,0.062000
2014-09-29,0.034000
2017-09-27,0.040000
2019-06-26,0.059000
2024-03-26,0.075000
2008-03-28,0.068000
2015-09-28,0.038000
2016-03-28,0.042000
2016-12-22,0.047000
2015-03-27,0.046000
2018-06-27,0.193000
2022-06-28,0.264000
2025-03-27,0.074000
2007-09-25,0.091000
2009-09-25,0.065000
2011-09-26,0.057000
2011-12-21,0.363000
2018-09-26,0.051000
2019-12-20,0.164000
2022-03-29,0.025000
2023-12-21,0.094000
2008-06-27,0.058000
2008-09-26,0.062000
2009-12-22,0.100000
2013-12-23,0.422000
2012-03-27,0.044000
2020-12-21,0.139000
2025-09-26,0.071000
2016-09-27,0.033000
2022-12-21,0.056000
2026-06-26,0.075000
2004-06-22,0.011000
2010-09-23,0.052000
2010-12-21,0.113000
2012-12-31,0.003000