f/overrides/event-backup/dmb-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
2014-03-14,0.063000
2015-07-15,0.063000
2016-04-14,0.063000
2017-07-18,0.053000
2017-09-18,0.053000
2014-12-12,0.063000
2023-01-19,0.040000
2025-05-16,0.038000
2017-03-14,0.053000
2019-09-18,0.053000
2013-09-13,0.063000
2019-06-18,0.053000
2020-10-19,0.053000
2021-01-20,0.053000
2024-11-20,0.030000
2016-12-14,0.053000
2018-02-15,0.053000
2023-05-16,0.040000
2024-03-18,0.030000
2025-12-16,0.042000
2024-08-19,0.030000
2015-02-17,0.063000
2016-10-17,0.063000
2019-05-16,0.053000
2020-03-17,0.053000
2023-11-08,0.030000
2024-06-20,0.030000
2016-09-15,0.063000
2019-04-16,0.053000
2019-10-17,0.053000
2023-02-16,0.040000
2026-04-17,0.042000
2013-08-15,0.063000
2014-11-17,0.063000
2017-05-15,0.053000
2018-06-18,0.053000
2018-10-16,0.053000
2025-01-21,0.030000
2017-12-18,0.053000
2018-08-16,0.053000
2024-02-16,0.030000
2026-03-17,0.042000
2013-07-16,0.063000
2013-12-13,0.063000
2016-06-15,0.063000
2020-07-17,0.053000
2022-01-19,0.053000
2022-10-19,0.053000
2026-07-17,0.050000
2015-04-15,0.063000
2018-01-17,0.053000
2022-12-16,0.040000
2023-07-19,0.040000
2015-11-16,0.063000
2019-08-16,0.053000
2021-09-17,0.053000
2025-02-19,0.030000
2025-03-18,0.030000
2017-02-15,0.053000
2018-12-18,0.053000
2020-06-16,0.053000
2020-12-16,0.053000
2022-02-16,0.053000
2025-06-17,0.038000
2016-02-16,0.063000
2017-04-17,0.053000
2021-07-19,0.053000
2022-07-19,0.053000
2022-08-16,0.053000
2024-12-18,0.030000
2026-01-20,0.042000
2013-10-16,0.063000
2013-11-15,0.063000
2015-01-20,0.063000
2015-06-15,0.063000
2017-08-14,0.053000
2021-06-16,0.053000
2015-10-15,0.063000
2023-09-19,0.040000
2023-10-18,0.040000
2022-04-19,0.053000
2023-04-19,0.040000
2016-01-19,0.063000
2014-07-15,0.063000
2018-07-18,0.053000
2018-11-19,0.053000
2020-09-17,0.053000
2024-05-16,0.030000
2025-07-17,0.038000
2024-01-18,0.030000
2025-10-17,0.038000
2014-04-14,0.063000
2015-08-14,0.063000
2016-03-14,0.063000
2019-07-17,0.053000
2019-11-19,0.053000
2021-12-16,0.053000
2026-06-16,0.050000
2014-05-14,0.063000
2020-04-17,0.053000
2025-11-19,0.042000
2016-08-12,0.063000
2017-01-18,0.053000
2025-08-18,0.038000
2025-09-17,0.038000
2026-08-18,0.050000
2016-07-18,0.063000
2017-10-17,0.053000
2018-03-15,0.053000
2019-12-17,0.053000
2022-06-16,0.053000
2024-09-19,0.030000
2026-02-18,0.042000
2016-05-16,0.063000
2017-06-14,0.053000
2018-05-15,0.053000
2019-03-18,0.053000
2021-08-17,0.053000
2022-05-17,0.053000
2024-04-16,0.030000
2014-06-13,0.063000
2015-05-14,0.063000
2017-11-16,0.053000
2021-02-17,0.053000
2022-11-09,0.040000
2023-03-16,0.040000
2015-03-13,0.063000
2018-04-17,0.053000
2020-05-18,0.053000
2021-04-19,0.053000
2021-10-19,0.053000
2024-10-18,0.030000
2026-05-18,0.050000
2014-01-15,0.063000
2015-12-14,0.063000
2019-02-15,0.053000
2020-02-19,0.053000
2023-06-16,0.040000
2023-12-18,0.030000
2014-08-14,0.063000
2015-09-15,0.063000
2021-11-17,0.053000
2023-08-16,0.040000
2014-10-15,0.063000
2019-01-17,0.053000
2025-04-16,0.030000
2014-02-18,0.063000
2018-09-19,0.053000
2021-03-16,0.053000
2021-05-18,0.053000
2024-07-18,0.030000
2014-09-15,0.063000
2016-11-07,0.053000
2020-01-17,0.053000
2020-08-17,0.053000
2020-11-18,0.053000
2022-03-16,0.053000