f/overrides/event-backup/lcbex-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
2020-12-18,0.130000
2022-12-20,0.920000
2026-06-30,0.533000
2016-03-31,0.078000
2018-12-06,1.045000
2019-12-19,1.272000
2021-03-31,0.089000
2025-09-30,0.095000
2017-12-21,0.085000
2020-09-30,0.107000
2022-03-31,0.119000
2015-12-22,0.072000
2019-06-28,0.486000
2021-09-30,0.090000
2024-06-28,0.345000
2023-09-29,0.131000
2013-09-30,0.074000
2014-06-27,0.096000
2014-09-30,0.090000
2018-03-28,0.088000
2020-06-30,0.211000
2021-06-30,0.091000
2015-03-31,0.069000
2015-06-30,0.117000
2016-09-30,0.071000
2017-06-30,0.160000
2018-09-27,0.093000
2018-12-20,0.140000
2014-03-28,0.117000
2017-03-31,0.075000
2017-09-29,0.078000
2024-03-28,0.122000
2026-03-31,0.102000
2019-03-29,0.099000
2021-12-20,2.894000
2014-12-23,0.088000
2025-06-30,0.800000
2024-12-20,2.355000
2013-06-26,0.094000
2017-12-06,1.379000
2018-06-28,0.102000
2019-09-30,0.104000
2022-09-30,0.121000
2024-09-30,0.111000
2013-12-26,0.057000
2016-12-07,0.386000
2023-06-30,0.682000
2025-03-31,0.112000
2020-03-31,0.117000
2022-06-30,0.459000
2023-12-19,1.722000
2025-12-19,3.086000
2015-09-30,0.102000
2016-06-30,0.100000
2016-12-22,0.084000
2023-03-31,0.125000