f/overrides/event-backup/nfty-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
2020-12-24,0.013000
2013-09-20,0.551000
2021-12-23,0.500000
2024-12-13,0.761000
2017-12-21,0.542000
2021-06-24,0.018000
2022-09-23,0.225000
2016-09-21,1.006000
2019-06-14,0.048000
2019-09-25,0.187000
2022-03-25,1.295000
2025-12-12,0.721000
2014-09-23,0.189000
2020-06-25,0.127000
2012-09-21,0.692000
2017-09-21,0.928000
2021-03-25,0.136000
2023-06-27,0.018000
2024-03-21,0.079000
2024-06-27,0.061000
2015-09-23,1.249000
2020-03-26,0.093000
2022-12-23,1.054000
2023-03-24,0.053000
2019-03-21,0.106000
2021-09-23,0.077000
2026-03-26,0.305000