f/overrides/event-backup/iwp-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
2021-09-24,0.133000
2025-03-18,0.099000
2005-06-20,0.014250
2007-09-25,0.040500
2018-09-26,0.213500
2019-03-20,0.116000
2011-09-23,0.052000
2017-03-24,0.107000
2017-09-26,0.129500
2022-03-24,0.114000
2001-12-14,0.002250
2002-12-13,0.008250
2008-03-24,0.041000
2010-09-23,0.052500
2022-06-09,0.111000
2021-12-30,0.017000
2022-09-26,0.182000
2004-03-26,0.011250
2006-03-24,0.044500
2009-07-02,0.046000
2013-03-25,0.063000
2007-12-27,0.055750
2024-09-25,0.165000
2025-09-16,0.119000
2017-07-06,0.122000
2022-12-13,0.236000
2002-03-08,0.000500
2003-09-12,0.008000
2010-07-02,0.055000
2013-09-24,0.092500
2014-12-24,0.161500
2003-06-13,0.006000
2006-06-22,0.074500
2009-09-22,0.044500
2014-07-02,0.126500
2009-03-24,0.043000
2016-07-06,0.123000
2016-12-22,0.198000
2018-12-17,0.105000
2004-06-25,0.011500
2006-12-20,0.025250
2007-06-28,0.032000
2008-07-02,0.054500
2019-09-24,0.094500
2019-12-16,0.132000
2021-06-10,0.057000
2023-06-07,0.085000
2023-03-23,0.141000
2023-09-26,0.180000
2003-12-12,0.014750
2013-12-23,0.101500
2015-09-25,0.097000
2018-07-03,0.126500
2020-12-14,0.078000
2025-06-16,0.133000
2002-09-13,0.004000
2011-12-22,0.084000
2017-12-21,0.112000
2018-03-22,0.137000
2021-12-13,0.091000
2023-12-20,0.153000
2003-03-07,0.004750
2013-07-02,0.078000
2015-07-02,0.113000
2020-09-23,0.103500
2011-07-05,0.069000
2012-03-23,0.058500
2014-03-25,0.102500
2015-12-24,0.145500
2001-10-01,0.002250
2002-06-14,0.003250
2005-09-23,0.029000
2010-03-24,0.042500
2026-06-15,0.162000
2024-12-17,0.119000
2005-03-24,0.025500
2010-12-22,0.089500
2015-03-25,0.096000
2016-09-26,0.099000
2024-03-21,0.118000
2004-09-24,0.016500
2005-12-22,0.041250
2007-03-23,0.052250
2012-12-19,0.203000
2021-03-25,0.052000
2026-03-17,0.054000
2003-12-16,0.008250
2009-12-23,0.065000
2011-03-24,0.052000
2019-06-17,0.111500
2004-12-23,0.019250
2008-12-23,0.060000
2012-06-26,0.065500
2024-06-11,0.105000
2020-03-25,0.105500
2020-06-15,0.101500
2025-12-16,0.158000
2006-09-26,0.035250
2008-09-24,0.042500
2012-09-24,0.086000
2014-09-24,0.088000