f/overrides/event-backup/lidax-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
2009-12-18,0.068000
2011-03-31,0.051000
2013-12-31,0.034000
2014-09-30,0.083000
2018-06-29,0.104000
2008-12-23,0.041000
2012-12-28,0.019000
2015-06-30,0.105000
2017-12-29,0.030000
2025-09-23,0.051000
2009-09-30,0.047000
2014-12-19,0.506000
2017-09-29,0.046000
2019-03-29,0.047000
2020-12-18,0.024000
2010-06-30,0.136000
2021-06-29,0.091000
2023-06-29,0.100000
2017-06-30,0.083000
2020-12-29,0.044000
2026-03-27,0.055000
2009-03-31,0.058000
2024-12-27,0.040000
2025-03-27,0.032000
2013-06-28,0.184000
2012-06-29,0.157000
2018-12-27,0.019000
2020-03-27,0.010000
2021-12-17,0.069000
2011-12-16,0.023000
2010-03-31,0.062000
2011-06-30,0.205000
2014-03-28,0.099000
2014-12-31,0.024000
2015-03-31,0.063000
2017-03-31,0.063000
2022-12-28,0.032000
2008-09-26,0.135000
2023-09-28,0.034000
2016-09-30,0.032000
2020-06-30,0.045000
2020-09-29,0.037000
2021-09-29,0.048000
2023-12-27,0.064000
2025-06-24,0.159000
2012-12-18,0.014000
2014-06-27,0.154000
2015-09-30,0.034000
2016-06-30,0.101000
2016-12-16,0.019000
2019-06-28,0.119000
2019-09-27,0.023000
2021-12-29,0.037000
2009-06-30,0.103000
2025-12-30,0.028000
2024-09-25,0.039000
2011-09-30,0.080000
2015-12-31,0.035000
2016-03-31,0.062000
2023-03-30,0.037000
2026-06-26,0.137000
2010-12-17,0.066000
2013-03-28,0.028000
2016-12-30,0.034000
2018-09-28,0.056000
2010-09-30,0.073000
2012-03-30,0.062000
2012-09-28,0.072000
2019-12-27,0.033000
2021-03-30,0.013000
2024-03-27,0.042000
2011-12-30,0.035000
2013-12-18,0.044000
2022-09-29,0.052000
2013-09-27,0.085000
2022-06-29,0.135000
2024-06-27,0.141000
2022-03-30,0.035000
2018-03-29,0.039000