f/overrides/event-backup/frisx-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
2024-04-22,0.299000
2025-04-21,0.263000
2014-03-03,0.100000
2017-10-02,0.207000
2020-10-01,0.211000
2021-04-01,0.225000
2022-07-20,0.283000
2022-12-20,0.218000
2023-04-20,0.298000
2023-07-20,0.306000
2017-12-01,1.659000
2020-04-01,0.224000
2020-07-01,0.220000
2026-04-20,0.230000
2026-07-20,0.250000
2022-10-20,0.284000
2024-07-22,0.284000
2015-03-02,0.108000
2016-07-01,0.220000
2019-10-01,0.232000
2024-10-21,0.285000
2024-12-20,8.474000
2014-12-01,0.795000
2018-04-02,0.200000
2018-12-03,2.427000
2016-04-01,0.233000
2016-10-03,0.208000
2016-12-01,1.497000
2019-07-01,0.231000
2021-07-01,0.218000
2013-12-02,0.578000
2015-06-01,0.219000
2015-12-01,2.207000
2021-10-01,0.223000
2023-10-20,0.311000
2025-10-20,0.255000
2018-07-02,0.228000
2021-12-01,3.906000
2022-04-20,0.261000
2014-06-02,0.189000
2014-09-02,0.203000
2017-07-03,0.227000
2022-12-15,3.335000
2017-04-03,0.205000
2019-04-01,0.213000
2019-12-02,1.638000
2023-12-20,3.424000
2025-07-21,0.266000
2025-12-22,8.773000
2015-09-01,0.208000
2018-10-01,0.228000
2020-12-01,0.231000