f/overrides/event-backup/kmdnx-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
2015-09-29,0.065000
2011-06-29,0.170000
2012-09-27,0.102000
2020-03-30,0.117000
2023-03-30,0.123000
2024-03-28,0.189000
2024-09-27,0.158000
2025-12-30,0.102000
2009-12-30,0.243000
2017-06-28,0.083000
2021-03-30,0.077000
2012-06-27,0.103000
2013-12-30,0.335000
2019-09-26,0.117000
2024-12-30,0.121000
2010-09-29,0.074000
2012-12-27,0.227000
2010-12-30,0.407000
2014-09-29,0.132000
2014-12-30,0.223000
2017-12-28,0.084000
2021-12-29,0.007000
2008-12-30,0.004000
2010-06-29,0.085000
2020-09-28,0.074000
2013-09-26,0.055000
2015-06-30,0.066000
2019-06-26,0.114000
2022-12-29,0.076000
2018-03-28,0.122000
2018-06-28,0.113000
2022-06-29,0.038000
2022-09-29,0.058000
2016-09-27,0.092000
2020-06-29,0.082000
2021-09-29,0.046000
2023-09-28,0.156000
2026-03-30,0.139000
2015-12-30,0.010000
2018-12-28,0.111000
2023-06-29,0.109000
2016-03-31,0.110000
2017-09-28,0.110000
2020-12-30,0.058000
2015-03-31,0.102000
2019-12-30,0.101000
2016-06-29,0.120000
2023-12-28,0.132000
2011-03-30,0.018000
2011-09-29,0.068000
2017-03-30,0.167000
2025-09-29,0.127000
2013-06-26,0.065000
2014-03-27,0.015000
2019-03-27,0.119000
2021-06-29,0.046000
2022-03-30,0.049000
2012-03-30,0.113000
2013-03-28,0.076000
2024-06-27,0.154000
2025-06-27,0.134000
2026-06-29,0.118000
2011-12-29,0.155000
2018-09-27,0.108000
2016-12-30,0.109000
2025-03-28,0.159000
2010-03-31,0.087000
2014-06-26,0.134000