f/overrides/event-backup/fez-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
2009-09-18,0.099000
2009-12-18,0.220000
2013-12-20,0.188000
2015-09-18,0.068000
2017-09-15,0.140000
2019-12-20,0.103000
2005-06-20,0.673000
2008-03-20,0.053000
2025-12-22,0.514000
2026-06-22,1.112000
2023-03-20,0.134000
2024-03-18,0.099000
2014-06-20,0.919000
2025-06-23,1.070000
2004-09-20,0.175000
2013-06-21,0.798000
2021-06-21,0.563000
2026-03-23,0.092000
2013-03-15,0.070000
2014-12-19,0.295000
2016-06-17,0.820000
2019-03-15,0.092000
2022-03-21,0.098000
2003-09-22,0.150000
2004-03-22,0.027000
2016-12-16,0.104000
2017-12-15,0.125000
2022-09-19,0.167000
2024-09-23,0.085000
2012-06-15,0.850000
2012-12-21,0.181000
2009-06-19,0.914000
2017-03-17,0.071000
2019-09-20,0.053000
2005-12-19,0.052000
2007-06-15,1.219000
2016-03-18,0.064000
2018-12-21,0.124000
2022-06-21,0.751000
2023-09-18,0.120000
2003-12-22,0.025000
2012-03-16,0.097000
2010-09-17,0.072000
2014-09-19,0.084000
2016-09-16,0.134000
2025-09-22,0.063000
2007-12-21,1.062000
2010-06-18,0.863000
2015-06-19,0.783000
2018-06-15,0.899000
2018-09-21,0.047000
2020-06-22,0.354000
2021-03-22,0.020000
2008-12-19,0.184000
2012-09-21,0.134000
2006-06-16,0.912000
2009-03-20,0.057000
2015-12-18,0.147000
2020-09-21,0.184000
2003-06-20,0.458000
2006-03-17,0.049000
2008-09-19,0.145000
2011-03-18,0.083000
2015-03-20,0.044000
2020-03-23,0.098000
2006-12-15,0.129000
2007-09-21,0.262000
2022-12-19,0.166000
2023-06-20,0.944000
2007-03-16,0.054000
2017-06-16,0.657000
2013-09-20,0.093000
2014-03-21,0.097000
2024-06-24,1.074000
2024-12-23,0.157000
2005-03-22,0.080000
2011-09-16,0.162000
2020-12-21,0.250000
2008-06-20,1.581000
2011-06-17,1.078000
2004-12-20,0.041000
2006-09-15,0.228000
2010-12-17,0.254000
2019-06-21,0.817000
2021-12-20,0.572000
2025-03-24,0.146000
2003-03-21,0.032000
2004-06-21,0.588000
2011-12-16,0.218000
2018-03-16,0.077000
2021-09-20,0.065000
2023-12-18,0.119000
2005-09-19,0.185000
2010-03-19,0.049000