f/overrides/event-backup/cblax-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
2026-03-17,0.228000
2005-03-24,0.106000
2006-09-28,0.123000
2009-12-04,0.114000
2014-12-10,1.403000
2018-06-15,0.124000
2022-06-16,0.098000
2025-03-18,0.208000
2007-12-10,0.294000
2008-09-29,0.145000
2010-12-06,0.117000
2014-09-24,0.080000
2015-03-20,0.038000
2020-12-08,2.090000
2024-06-18,0.232000
2005-12-15,0.109000
2010-09-23,0.104000
2012-06-22,0.078000
2012-09-25,0.084000
2019-03-18,0.114000
2024-12-09,3.183000
2025-09-17,0.235000
2004-09-29,0.083000
2006-12-11,0.115000
2009-03-27,0.119000
2013-12-09,0.084000
2015-09-22,0.209000
2015-12-10,0.892000
2019-09-18,0.162000
2004-06-29,0.076000
2014-06-24,0.080000
2016-09-19,0.097000
2022-09-19,0.119000
2023-03-16,0.121000
2023-12-08,0.198000
2016-03-17,0.071000
2019-06-13,0.160000
2019-12-06,1.270000
2020-06-15,0.138000
2026-06-16,0.221000
2010-03-26,0.069000
2016-12-09,0.248000
2017-03-17,0.081000
2018-12-07,1.704000
2021-06-16,0.076000
2023-06-16,0.212000
2008-06-27,0.142000
2013-09-24,0.062000
2020-03-17,0.135000
2003-06-25,0.073000
2004-03-30,0.075000
2004-12-15,0.140000
2013-06-21,0.051000
2015-06-18,0.206000
2017-09-19,0.111000
2011-03-22,0.072000
2021-12-08,4.362000
2022-03-16,0.093000
2022-12-08,1.744000
2024-03-18,0.212000
2005-06-24,0.085000
2006-06-29,0.102000
2014-03-21,0.072000
2017-06-16,0.098000
2008-12-05,0.146000
2016-06-17,0.086000
2020-09-18,0.106000
2003-09-25,0.051000
2003-12-12,0.078000
2006-03-30,0.097000
2011-06-24,0.093000
2012-12-07,0.106000
2013-03-22,0.055000
2018-09-19,0.137000
2021-09-17,0.081000
2003-03-26,0.071000
2005-09-26,0.094000
2007-06-28,0.128000
2007-09-27,0.137000
2008-03-28,0.135000
2010-06-24,0.085000
2011-09-23,0.088000
2024-09-18,0.253000
2025-06-17,0.207000
2025-12-08,2.742000
2009-06-24,0.112000
2012-03-23,0.065000
2018-03-16,0.081000
2023-09-19,0.244000
2007-03-29,0.112000
2009-09-28,0.103000
2011-12-06,0.923000
2017-12-08,0.764000
2021-03-16,0.074000