f/overrides/event-backup/gal-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
2022-09-20,0.434000
2012-09-28,0.165000
2013-09-30,0.113000
2015-03-31,0.103000
2020-06-23,0.260000
2021-03-23,0.079000
2022-06-21,0.385000
2019-03-19,0.122000
2019-09-24,0.218000
2021-12-28,1.313000
2026-03-26,0.138000
2016-09-30,0.080000
2018-03-23,0.061000
2024-09-24,0.233000
2014-06-30,0.332000
2014-09-30,0.143000
2017-03-31,0.116000
2022-03-22,0.109000
2023-12-19,0.142000
2024-06-25,0.478000
2013-12-27,0.342000
2015-12-29,0.481000
2018-12-27,0.336000
2020-09-22,0.153000
2014-03-31,0.123000
2012-06-29,0.260000
2012-12-27,0.339000
2016-06-30,0.242000
2017-06-30,0.293000
2024-12-26,0.467000
2018-06-25,0.285000
2020-03-24,0.139000
2025-03-26,0.179000
2025-09-24,0.282000
2026-06-25,0.447000
2013-03-28,0.120000
2019-12-24,0.466000
2016-12-28,0.357000
2017-12-27,0.337000
2018-09-24,0.157000
2021-06-22,0.314000
2021-09-21,0.161000
2023-09-19,0.392000
2013-06-28,0.277000
2023-03-21,0.131000
2024-03-19,0.146000
2025-06-25,0.427000
2015-09-30,0.157000
2022-12-20,1.398000
2023-06-20,0.396000
2025-12-29,0.829000
2014-12-29,0.569000
2015-06-30,0.279000
2016-03-31,0.122000
2017-09-29,0.120000
2019-06-25,0.380000
2020-12-29,0.363000