f/overrides/event-backup/higux-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
2019-04-01,0.134000
2020-10-01,0.096000
2017-06-30,0.088000
2019-12-19,0.673000
2024-12-30,3.201000
2012-09-28,0.073000
2015-09-30,0.103000
2016-12-22,1.035000
2023-04-03,0.131000
2012-03-30,0.074000
2021-12-20,2.145000
2022-04-01,0.120000
2023-12-19,2.457000
2025-04-01,0.088000
2025-12-26,3.567000
2026-04-01,0.097000
2013-09-30,0.088000
2018-06-29,0.111000
2023-07-03,0.100000
2013-03-28,0.084000
2013-06-28,0.088000
2013-12-18,0.418000
2014-09-30,0.089000
2024-04-01,0.124000
2012-06-29,0.098000
2015-06-30,0.097000
2022-12-19,1.323000
2024-10-01,0.101000
2026-07-01,0.075000
2018-12-20,1.603000
2020-04-01,0.136000
2022-10-03,0.111000
2014-12-19,0.256000
2022-07-01,0.103000
2021-10-01,0.106000
2012-12-18,0.376000
2015-12-18,0.077000
2021-07-01,0.105000
2016-06-30,0.100000
2018-03-29,0.140000
2024-07-01,0.095000
2017-12-21,0.607000
2021-04-01,0.119000
2025-10-01,0.081000
2025-07-01,0.090000
2011-12-16,0.722000
2016-09-30,0.109000
2023-10-02,0.108000
2017-09-29,0.114000
2018-09-28,0.126000
2019-07-01,0.111000
2020-07-01,0.110000
2011-10-13,0.075000
2014-06-30,0.090000
2015-03-31,0.083000
2019-10-01,0.118000
2020-12-18,0.826000
2014-03-31,0.085000
2016-03-31,0.115000
2017-03-31,0.112000