f/overrides/event-backup/ffdkx-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
2010-07-09,0.073000
2012-12-14,0.307000
2015-08-07,1.874000
2019-08-09,1.709000
2025-12-19,1.111000
2023-12-15,1.209000
2009-12-18,0.088000
2010-12-17,0.157000
2014-08-08,3.118000
2014-12-12,1.908000
2017-12-08,1.123000
2018-12-07,0.687000
2008-12-19,0.130000
2009-04-03,0.127000
2013-12-13,1.187000
2022-12-09,0.241000
2025-08-08,0.295000
2008-07-11,0.107000
2009-07-10,0.119000
2011-04-06,0.025000
2017-08-11,4.169000
2018-08-10,2.332000
2022-08-05,0.189000
2020-08-07,0.173000
2020-12-11,1.556000
2008-08-08,0.990000
2009-10-02,0.147000
2011-12-16,0.186000
2015-12-11,0.476000
2016-12-09,1.304000
2019-12-13,1.076000
2021-08-06,3.124000
2008-10-03,0.107000
2011-08-05,0.080000
2012-08-03,0.237000
2016-08-12,1.625000
2021-12-10,0.574000
2010-10-01,0.063000
2013-08-02,2.173000
2023-08-11,0.641000