f/overrides/event-backup/agbvx-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
2012-09-18,0.243000
2015-12-28,0.043000
2018-12-20,0.575000
2024-06-18,0.097000
2012-12-11,0.013000
2013-12-10,0.037000
2017-12-26,0.169000
2019-12-20,0.175000
2023-09-19,0.041000
2025-06-24,0.026000
2012-12-26,0.093000
2013-09-10,0.415000
2017-12-19,0.026000
2020-03-10,0.032000
2022-09-20,0.040000
2025-12-16,0.189000
2014-12-23,0.439000
2020-06-16,0.032000
2023-12-19,0.122000
2026-03-10,0.022000
2026-06-09,0.105000
2016-12-20,0.029000
2020-12-22,0.031000
2022-09-30,0.040000
2024-12-17,0.138000
2025-09-23,0.111000
2016-12-27,0.115000
2021-12-21,0.220000
2022-06-21,0.034000
2022-03-22,0.039000
2022-12-21,0.462000
2025-03-25,0.079000