f/overrides/event-backup/fipdx-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
2017-07-31,0.001000
2018-02-28,0.002000
2018-10-31,0.003000
2020-05-29,0.003000
2023-07-31,0.001000
2018-11-30,0.003000
2019-01-31,0.003000
2019-09-30,0.003000
2020-12-31,0.001000
2013-12-27,0.062000
2016-12-23,0.125000
2017-08-31,0.001000
2017-12-26,0.114000
2018-12-31,0.003000
2019-06-28,0.004000
2023-06-30,0.001000
2015-12-23,0.026000
2017-09-29,0.001000
2020-06-30,0.002000
2024-04-05,0.012000
2018-05-31,0.003000
2019-03-29,0.004000
2019-11-29,0.003000
2020-12-23,0.110000
2023-12-21,0.306000
2024-10-04,0.078000
2014-10-31,0.001000
2016-05-31,0.001000
2017-06-30,0.001000
2019-10-31,0.003000
2025-10-03,0.084000
2016-06-30,0.001000
2017-10-31,0.001000
2018-03-29,0.002000
2023-04-28,0.001000
2024-12-18,0.145000
2012-12-21,0.048000
2014-12-30,0.105000
2016-02-12,0.021000
2016-07-29,0.001000
2016-10-31,0.001000
2020-08-31,0.002000
2023-08-31,0.002000
2018-07-31,0.003000
2018-08-31,0.003000
2020-02-28,0.003000
2020-03-31,0.003000
2020-11-30,0.001000
2023-05-31,0.001000
2025-07-11,0.076000
2015-02-13,0.010000
2017-11-30,0.001000
2019-04-30,0.003000
2019-07-31,0.004000
2024-07-05,0.095000
2016-11-30,0.001000
2016-12-30,0.001000
2017-12-29,0.002000
2018-04-30,0.002000
2019-02-28,0.003000
2023-11-30,0.002000
2023-12-29,0.003000
2016-09-30,0.001000
2018-09-28,0.003000
2019-08-30,0.004000
2019-12-31,0.003000
2025-12-17,0.190000
2026-07-10,0.120000
2018-06-29,0.003000
2018-12-26,0.183000
2020-01-31,0.003000
2020-07-31,0.002000
2020-09-30,0.002000
2021-12-22,0.531000
2023-10-31,0.002000
2020-10-30,0.002000
2023-03-31,0.001000
2023-09-29,0.002000
2026-04-01,0.001000
2017-01-31,0.001000
2018-01-31,0.002000
2019-05-31,0.004000
2020-04-30,0.003000
2022-12-22,0.800000
2016-08-31,0.001000
2019-12-26,0.157000
2024-01-31,0.003000
2025-04-04,0.031000