f/overrides/event-backup/himdx-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
2025-12-29,0.082000
2013-12-31,0.061000
2014-12-08,1.162000
2017-12-07,3.773000
2018-12-07,4.594000
2021-12-29,0.352000
2022-12-08,3.780000
2025-12-04,0.173000
2012-12-31,0.236000
2013-12-10,1.292000
2015-12-09,0.146000
2015-12-29,0.063000
2023-12-07,1.998000
2024-12-27,0.121000
2016-12-07,0.128000
2024-12-05,4.451000