f/overrides/event-backup/abwax-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
2008-12-18,0.439000
2009-06-18,0.065000
2010-04-30,0.028000
2005-06-23,0.046000
2005-09-27,0.022000
2006-03-23,0.058000
2008-03-19,0.048000
2008-06-19,0.104000
2013-12-13,0.360000
2016-12-12,0.434000
2004-03-25,0.026000
2006-09-21,0.068000
2009-09-17,0.044000
2013-03-13,0.097000
2021-12-15,1.608000
2024-12-18,0.470000
2007-03-22,0.031000
2009-03-19,0.099000
2010-03-18,0.040000
2010-12-16,0.112000
2014-12-15,0.324000
2025-12-17,1.737000
2006-12-21,0.228000
2009-12-16,0.086000
2010-09-16,0.050000
2015-12-14,0.312000
2023-12-13,0.177000
2017-12-18,0.184000
2004-09-23,0.036000
2005-12-22,0.125000
2007-09-19,0.063000
2011-03-17,0.103000
2013-09-11,0.018000
2012-09-13,0.018000
2022-12-14,0.371000
2005-03-23,0.047000
2006-06-22,0.070000
2011-06-16,0.030000
2011-12-16,0.053000
2012-03-16,0.094000
2011-09-16,0.090000
2012-06-15,0.038000
2012-12-14,0.111000
2003-12-23,0.038000
2004-12-21,0.103000
2007-06-21,0.080000
2008-09-18,0.068000
2010-06-17,0.071000
2020-12-16,0.468000
2004-06-24,0.038000
2007-12-19,0.415000
2019-12-18,0.465000