f/overrides/event-backup/jascx-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
2018-12-07,2.136000
2025-12-30,0.049000
1998-12-29,0.004000
2009-03-31,0.043000
2011-12-29,0.028000
2015-12-30,0.122000
2017-12-28,0.190000
2003-09-24,0.020000
2023-12-28,0.106000
2008-03-31,0.022000
2009-06-30,0.018000
2010-12-30,0.032000
2020-12-29,0.125000
2022-12-28,0.142000
2007-12-26,0.055000
2008-06-30,0.021000
2010-03-30,0.016000
2002-12-26,0.012000
2003-03-26,0.070000
2004-12-01,0.997000
2005-12-30,0.007000
2006-12-01,0.216000
2014-12-04,0.874000
2015-12-03,1.241000
2024-12-05,2.473000
2024-12-30,0.074000
2005-12-01,0.299000
2006-12-29,0.041000
2017-12-05,7.363000
2016-12-29,0.170000
2003-12-23,0.040000
2005-09-30,0.034000
2007-03-30,0.024000
2007-06-29,0.047000
2013-12-30,0.904000
2003-06-25,0.020000
2025-12-05,1.372000
2010-06-29,0.002000
2012-12-28,0.512000
2021-12-29,0.093000
2022-12-07,1.670000
2023-12-06,0.094000