f/overrides/event-backup/mlpzx-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
2023-08-03,0.033000
2025-01-06,0.035000
2015-08-07,0.065000
2016-05-06,0.065000
2021-07-06,0.033000
2017-09-07,0.057000
2024-10-03,0.035000
2026-01-06,0.038000
2012-09-06,0.065000
2014-06-05,0.065000
2015-10-07,0.065000
2016-10-07,0.065000
2018-03-09,0.057000
2023-10-04,0.034000
2025-09-04,0.038000
2011-02-07,0.064000
2012-03-07,0.065000
2014-09-09,0.065000
2019-06-07,0.057000
2026-04-06,0.040000
2026-05-05,0.040000
2012-08-08,0.065000
2014-01-07,0.065000
2019-03-08,0.057000
2016-03-04,0.065000
2017-03-07,0.065000
2021-09-03,0.033000
2022-11-29,0.033000
2023-09-06,0.033000
2011-10-04,0.064000
2012-02-08,0.065000
2013-01-04,0.065000
2024-05-03,0.034000
2026-07-06,0.040000
2018-11-28,0.057000
2020-02-05,0.057000
2020-06-03,0.057000
2020-10-05,0.033000
2021-08-04,0.033000
2015-11-25,0.065000
2017-01-06,0.065000
2018-02-09,0.057000
2025-02-05,0.035000
2021-11-03,0.033000
2021-11-24,0.033000
2022-11-03,0.033000
2023-02-03,0.033000
2024-11-05,0.035000
2014-02-06,0.065000
2015-04-08,0.065000
2021-03-03,0.033000
2026-08-05,0.040000
2019-04-05,0.057000
2019-11-05,0.057000
2022-09-06,0.033000
2023-11-29,0.034000
2011-11-28,0.065000
2012-10-04,0.065000
2017-06-07,0.057000
2022-08-03,0.033000
2023-03-03,0.033000
2024-04-03,0.034000
2025-11-05,0.038000
2016-07-08,0.065000
2019-07-09,0.057000
2022-02-03,0.033000
2014-08-07,0.065000
2015-03-06,0.065000
2021-02-03,0.033000
2022-04-05,0.033000
2025-08-05,0.038000
2010-11-05,0.064000
2012-04-05,0.065000
2013-11-29,0.065000
2014-05-06,0.065000
2015-02-06,0.065000
2023-11-03,0.034000
2011-06-07,0.064000
2011-09-07,0.064000
2013-06-05,0.065000
2013-09-04,0.065000
2015-05-06,0.065000
2015-06-05,0.065000
2015-09-09,0.065000
2018-07-06,0.057000
2010-12-07,0.064000
2012-01-05,0.065000
2013-04-04,0.065000
2022-01-05,0.033000
2024-06-05,0.035000
2024-08-05,0.035000
2018-01-05,0.057000
2018-08-10,0.057000
2019-01-04,0.057000
2019-08-09,0.057000
2019-11-26,0.057000
2010-07-07,0.063000
2014-04-08,0.065000
2017-07-07,0.057000
2020-11-04,0.033000
2020-11-24,0.033000
2023-01-05,0.033000
2017-10-06,0.057000
2025-03-05,0.035000
2010-06-07,0.063000
2010-08-05,0.063000
2013-05-08,0.065000
2012-07-06,0.065000
2012-11-07,0.065000
2016-08-05,0.065000
2017-05-05,0.057000
2018-09-07,0.057000
2010-10-05,0.063000
2011-04-05,0.064000
2012-06-06,0.065000
2025-07-03,0.038000
2026-06-03,0.040000
2020-07-07,0.033000
2023-04-05,0.033000
2025-04-03,0.038000
2022-07-06,0.033000
2016-01-08,0.065000
2016-02-05,0.065000
2016-11-04,0.065000
2020-01-06,0.057000
2025-11-25,0.038000
2026-02-04,0.038000
2011-05-04,0.064000
2019-02-08,0.057000
2019-05-10,0.057000
2014-10-07,0.065000
2018-11-02,0.057000
2023-07-06,0.033000
2020-03-04,0.057000
2022-06-03,0.033000
2024-01-04,0.034000
2024-11-26,0.035000
2011-11-07,0.065000
2017-11-28,0.057000
2018-04-06,0.057000
2022-05-04,0.033000
2024-02-05,0.034000
2017-02-07,0.065000
2019-09-06,0.057000
2021-05-05,0.033000
2014-11-26,0.065000
2017-04-05,0.057000
2020-04-03,0.057000
2021-06-03,0.033000
2022-10-05,0.033000
2024-07-03,0.035000
2013-11-06,0.065000
2016-04-08,0.065000
2018-05-04,0.057000
2021-04-06,0.033000
2013-07-03,0.065000
2016-09-09,0.065000
2017-08-04,0.057000
2014-11-06,0.065000
2015-11-06,0.065000
2021-10-05,0.033000
2023-06-05,0.033000
2024-03-05,0.034000
2011-01-06,0.064000
2011-03-07,0.064000
2013-02-06,0.065000
2026-03-04,0.038000
2010-09-08,0.063000
2013-03-06,0.065000
2020-08-05,0.033000
2025-05-05,0.038000
2015-07-08,0.065000
2018-10-05,0.057000
2022-03-03,0.033000
2014-03-06,0.065000
2015-01-06,0.065000
2021-01-06,0.033000
2012-05-03,0.065000
2023-05-03,0.033000
2020-09-03,0.033000
2025-10-03,0.038000
2011-08-04,0.064000
2016-11-25,0.065000
2019-10-04,0.057000
2024-09-05,0.035000
2011-07-07,0.064000
2013-10-03,0.065000
2017-11-03,0.057000
2025-06-04,0.038000
2016-06-10,0.065000
2018-06-08,0.057000
2020-05-05,0.057000
2012-11-29,0.065000
2013-08-07,0.065000
2014-07-08,0.065000