f/overrides/event-backup/ntdix-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
2012-12-21,0.190000
2019-12-23,1.303000
2014-06-17,0.044000
2021-12-23,1.260000
2025-06-12,0.057000
2015-06-16,0.069000
2019-09-12,0.051000
2021-09-09,0.024000
2013-12-20,0.304000
2014-03-18,0.026000
2017-09-14,0.042000
2025-12-23,1.408000
2023-06-15,0.050000
2014-09-18,0.044000
2015-03-17,0.025000
2015-09-15,0.037000
2016-12-19,0.766000
2018-03-13,0.022000
2014-12-19,0.625000
2016-09-15,0.027000
2018-09-12,0.045000
2026-06-24,0.051000
2022-06-09,0.039000
2022-12-23,0.280000
2023-12-22,0.618000
2015-12-21,0.594000
2019-06-11,0.071000
2024-06-13,0.042000
2024-09-12,0.037000
2019-03-12,0.020000
2012-06-19,0.047000
2013-03-19,0.025000
2016-06-14,0.067000
2017-06-13,0.071000
2013-06-25,0.031000
2016-03-15,0.021000
2022-09-15,0.019000
2024-12-23,2.003000
2020-09-10,0.537000
2012-09-11,0.031000
2017-03-14,0.011000
2011-03-22,0.018000
2011-12-21,0.125000
2020-12-23,0.418000
2026-03-25,0.012000
2013-09-26,0.025000
2023-09-14,0.002000
2011-09-20,0.029000
2018-06-12,0.081000
2018-12-20,1.032000
2017-12-20,0.539000
2025-09-11,0.036000
2011-06-21,0.035000