f/overrides/event-backup/dprix-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
2017-08-02,0.263000
2017-11-02,0.157000
2018-11-02,0.148000
2023-08-02,0.167000
2024-05-02,0.111000
2024-08-02,0.165000
2014-11-04,0.179000
2016-08-02,0.278000
2024-11-04,0.033000
2019-05-02,0.144000
2022-08-02,0.157000
2023-05-02,0.150000
2024-12-13,7.730000
2015-08-04,0.307000
2016-12-29,3.580000
2020-12-15,2.385000
2021-05-04,0.112000
2025-08-04,0.133000
2025-12-15,11.184000
2026-08-04,0.095000
2014-12-30,0.134000
2016-05-03,0.247000
2015-11-03,0.155000
2018-08-02,0.287000
2019-08-02,0.216000
2020-05-04,0.163000
2025-05-02,0.063000
2013-12-17,0.222000
2014-12-16,1.344000
2015-05-04,0.284000
2016-11-02,0.131000
2019-11-04,0.104000
2019-12-13,3.735000
2020-11-03,0.117000
2013-11-04,0.174000
2014-05-02,0.280000
2020-08-04,0.135000
2022-12-14,4.167000
2026-05-04,0.070000
2014-08-04,0.317000
2015-12-30,3.527000
2018-05-02,0.136000
2022-11-02,0.084000
2023-11-02,0.088000
2023-12-14,1.069000
2017-05-02,0.213000
2017-12-28,6.909000
2021-12-15,5.876000
2022-05-03,0.105000
2018-12-13,5.654000
2021-08-03,0.153000