f/overrides/event-backup/fbnrx-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
2021-12-15,0.045000
2024-05-28,0.038000
2023-07-26,0.028000
2026-02-24,0.030000
2015-01-15,0.034000
2018-11-15,0.059000
2019-03-15,0.057000
2021-01-15,0.040000
2014-11-17,0.034000
2023-12-26,0.032000
2024-02-26,0.028000
2024-03-25,0.033000
2025-12-26,0.037000
2015-02-17,0.034000
2017-08-15,0.032000
2021-09-15,0.040000
2022-11-25,0.028000
2022-08-26,0.034000
2023-09-26,0.030000
2026-04-27,0.034000
2016-05-16,0.024000
2020-12-15,0.043000
2021-07-15,0.043000
2022-07-26,0.033000
2019-05-15,0.059000
2016-10-17,0.024000
2023-06-27,0.024000
2025-06-25,0.037000
2024-09-25,0.034000
2015-08-17,0.034000
2016-01-15,0.034000
2018-05-15,0.053000
2020-04-15,0.032000
2024-08-27,0.033000
2013-08-15,0.044000
2017-07-17,0.037000
2017-11-15,0.030000
2018-08-15,0.053000
2024-12-26,0.036000
2014-12-15,0.526000
2015-05-15,0.034000
2016-09-15,0.024000
2023-05-25,0.024000
2015-06-15,0.034000
2025-07-28,0.036000
2025-04-25,0.036000
2018-06-15,0.052000
2021-04-15,0.038000
2021-10-15,0.038000
2025-01-28,0.034000
2024-06-25,0.032000
2024-10-28,0.038000
2016-08-15,0.024000
2019-01-15,0.066000
2019-12-16,0.105000
2020-05-15,0.042000
2026-03-26,0.034000
2013-11-15,0.044000
2015-11-16,0.034000
2018-12-17,0.265000
2023-04-25,0.024000
2017-04-17,0.036000
2017-06-15,0.032000
2020-03-16,0.049000
2020-02-18,0.046000
2022-02-23,0.042000
2023-08-28,0.030000
2025-02-25,0.034000
2017-03-15,0.031000
2018-02-15,0.026000
2018-04-16,0.044000
2019-08-15,0.052000
2015-03-16,0.034000
2016-02-16,0.034000
2016-07-15,0.024000
2026-05-26,0.035000
2020-01-15,0.050000
2023-02-23,0.025000
2024-04-25,0.032000
2024-07-26,0.032000
2014-06-16,0.035000
2014-08-15,0.034000
2017-02-15,0.027000
2019-04-15,0.059000
2014-09-15,0.035000
2018-09-17,0.047000
2021-05-17,0.051000
2025-08-26,0.038000
2014-10-15,0.034000
2016-03-15,0.034000
2025-05-23,0.039000
2021-08-16,0.044000
2022-03-28,0.047000
2022-10-26,0.031000
2013-09-16,0.044000
2019-10-15,0.046000
2021-02-16,0.043000
2021-03-15,0.043000
2019-02-15,0.054000
2014-01-15,0.044000
2014-05-15,0.034000
2014-07-15,0.035000
2015-12-15,0.034000
2020-10-15,0.037000
2020-11-16,0.037000
2022-06-27,0.043000
2025-03-26,0.038000
2015-04-15,0.034000
2017-09-15,0.031000
2018-10-15,0.057000
2019-11-15,0.047000
2026-01-27,0.035000
2017-10-16,0.030000
2022-04-26,0.042000
2023-01-26,0.028000
2013-10-15,0.044000
2014-03-17,0.044000
2015-07-15,0.034000
2015-10-15,0.034000
2013-12-16,0.095000
2024-11-25,0.035000
2022-01-26,0.040000
2022-09-27,0.032000
2022-12-27,0.028000
2013-07-15,0.044000
2018-03-15,0.037000
2019-07-15,0.060000
2021-11-15,0.045000
2025-10-28,0.037000
2014-04-15,0.034000
2019-09-16,0.040000
2020-06-15,0.038000
2020-08-17,0.040000
2026-06-25,0.032000
2016-12-15,0.024000
2023-03-28,0.027000
2024-01-26,0.031000
2025-11-24,0.035000
2023-10-26,0.030000
2016-04-15,0.034000
2018-01-16,0.030000
2019-06-17,0.053000
2022-05-25,0.044000
2023-11-27,0.029000
2025-09-25,0.034000
2014-02-18,0.044000
2015-09-15,0.034000
2016-11-15,0.024000
2020-09-15,0.038000
2017-05-15,0.037000
2017-12-15,0.096000
2026-07-28,0.037000
2021-06-15,0.043000
2016-06-15,0.024000
2017-01-17,0.030000
2018-07-16,0.057000
2020-07-15,0.036000