f/overrides/event-backup/jlcax-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
2010-12-20,0.053000
2013-12-12,2.312000
2018-12-12,4.117000
2011-12-20,0.075000
2015-12-11,2.415000
2015-12-21,0.005000
2020-12-18,0.028000
2006-12-22,0.015000
2014-12-19,0.115000
2021-12-13,6.785000
2023-12-13,1.989000
2007-12-20,0.080000
2013-12-20,0.054000
2017-12-13,4.123000
2023-12-20,0.002000
2009-12-21,0.097000
2012-12-13,0.981000
2016-12-20,0.014000
2019-08-08,4.089000
2019-12-19,0.014000
2005-12-30,0.037000
2012-12-18,0.112000
2016-12-14,1.235000
2020-12-11,6.824000
2022-12-13,4.841000
2008-12-22,0.162000
2014-12-12,2.133000
2018-12-19,0.049000
2006-12-15,0.066000
2007-12-17,0.654000
2019-12-12,1.517000
2024-12-12,1.347000