f/overrides/event-backup/laz-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
2008-02-06,0.100000
2012-08-02,0.200000
2013-10-31,0.250000
2015-04-30,0.350000
2020-05-08,0.470000
2025-05-05,0.500000
2009-11-04,0.125000
2010-11-01,0.125000
2012-11-01,0.200000
2020-11-06,0.470000
2023-11-03,0.500000
2025-08-04,0.500000
2007-05-16,0.090000
2012-12-19,0.400000
2014-02-06,0.300000
2016-08-04,0.380000
2023-05-05,0.500000
2025-02-10,0.500000
2008-08-05,0.100000
2026-08-03,0.500000
2012-02-02,0.160000
2022-05-06,0.470000
2026-05-11,0.500000
2014-07-31,0.300000
2016-11-03,0.380000
2022-11-04,0.500000
2024-11-08,0.500000
2009-08-05,0.125000
2016-02-09,1.550000
2017-11-03,0.410000
2021-11-05,0.470000
2022-02-11,0.470000
2011-08-04,0.160000
2013-05-02,0.250000
2019-02-14,0.940000
2022-08-05,0.500000
2005-11-16,0.090000
2006-11-08,0.090000
2010-05-05,0.125000
2014-05-08,0.300000
2016-04-29,0.380000
2020-02-14,0.470000
2020-08-07,0.470000
2024-08-05,0.500000
2006-05-17,0.090000
2006-08-09,0.090000
2009-02-04,0.100000
2011-02-03,0.125000
2011-05-04,0.160000
2013-08-02,0.250000
2015-07-30,0.350000
2018-08-03,0.440000
2019-05-03,0.470000
2021-05-07,0.470000
2011-11-03,0.160000
2015-10-29,0.350000
2017-02-09,1.580000
2024-05-03,0.500000
2007-02-14,0.090000
2007-08-08,0.090000
2008-05-12,0.100000
2017-05-04,0.410000
2021-08-06,0.470000
2023-02-10,0.500000
2025-11-03,0.500000
2005-08-17,0.052000
2018-02-09,1.710000
2019-08-02,0.470000
2021-02-18,0.470000
2024-02-09,0.500000
2008-11-05,0.100000
2014-10-30,0.300000
2018-05-04,0.440000
2009-05-06,0.100000
2010-08-04,0.125000
2012-05-02,0.200000
2013-12-18,0.250000
2015-02-11,1.300000
2017-08-03,0.410000
2018-11-02,0.440000
2019-11-07,0.470000
2023-08-04,0.500000
2026-02-09,0.500000
2006-02-15,0.090000
2007-11-07,0.090000
2010-02-04,0.125000