f/overrides/event-backup/glbix-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
2012-09-20,0.019000
2016-12-15,0.007000
2017-11-16,0.882000
2022-11-17,0.328000
2024-12-12,0.166000
2012-06-21,0.038000
2009-03-26,0.013000
2011-06-23,0.045000
2017-12-21,0.011000
2022-06-16,0.004000
2022-12-15,0.086000
2008-12-30,0.045000
2012-03-22,0.016000
2013-06-20,0.031000
2013-11-27,1.096000
2014-12-18,0.030000
2009-12-30,0.010000
2015-11-19,0.366000
2016-11-17,0.868000
2019-06-20,0.012000
2025-12-10,0.203000
2011-12-29,0.069000
2011-11-29,0.098000
2012-12-27,0.086000
2014-09-18,0.012000
2018-11-15,0.640000
2019-03-14,0.005000
2022-09-15,0.044000
2011-09-22,0.016000
2017-09-21,0.007000
2019-12-19,0.059000
2024-11-14,0.566000
2010-03-25,0.017000
2013-12-26,0.061000
2014-03-20,0.027000
2019-09-19,0.012000
2020-12-17,0.023000
2021-11-18,0.192000
2023-09-14,0.012000
2025-11-13,0.714000
2010-11-24,0.497000
2009-09-24,0.034000
2010-04-30,0.037000
2010-12-30,0.028000
2014-06-20,0.045000
2014-11-20,1.086000
2018-06-21,0.018000
2018-12-20,0.002000
2009-06-24,0.040000
2023-12-14,0.225000