f/overrides/event-backup/gurax-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
2026-06-25,0.143000
2014-12-31,0.195000
2017-12-29,1.177000
2018-12-31,0.391000
2019-06-28,0.135000
2025-09-25,0.155000
2022-06-30,0.113000
2023-12-29,0.233000
2024-03-28,0.161000
2016-03-31,0.127000
2017-03-31,0.065000
2017-09-29,0.116000
2018-03-29,0.096000
2021-12-31,1.843000
2025-06-25,0.112000
2018-09-28,0.155000
2022-12-30,1.487000
2024-09-30,0.193000
2024-12-23,0.915000
2015-12-31,4.662000
2016-12-30,0.967000
2017-06-30,0.128000
2019-09-30,0.103000
2020-03-31,0.147000
2016-06-30,0.060000
2021-03-31,0.121000
2021-06-30,0.124000
2025-12-26,0.361000
2019-12-31,1.523000
2020-06-30,0.102000
2020-09-30,0.147000
2021-09-30,0.102000
2026-03-26,0.019000
2023-06-30,0.207000
2024-06-28,0.287000
2014-06-30,0.060000
2018-06-29,0.130000
2020-12-31,1.930000
2022-03-31,0.101000
2022-09-30,0.215000
2025-03-26,0.064000
2014-09-30,0.027000
2016-09-30,0.078000
2019-03-29,0.184000
2023-03-31,0.206000
2023-09-29,0.221000