f/overrides/event-backup/mlpx-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
2020-08-07,0.565000
2021-02-05,0.565000
2016-11-07,0.450000
2017-08-07,0.420000
2018-12-28,0.066000
2016-05-06,0.450000
2024-08-07,0.650000
2025-11-07,0.730000
2023-02-07,0.550000
2025-02-07,0.690000
2025-05-07,0.720000
2026-05-11,0.757000
2014-08-07,0.300000
2016-12-28,0.657000
2017-05-05,0.435000
2016-02-05,0.450000
2019-05-07,0.525000
2024-12-30,0.053000
2018-08-09,0.492000
2019-08-07,0.540000
2020-05-07,0.541000
2026-02-09,0.740000
2020-02-07,0.573000
2020-11-06,0.565000
2022-05-06,0.530000
2025-08-07,0.730000
2013-11-07,0.267000
2018-11-08,0.492000
2019-11-07,0.558000
2017-02-07,0.450000
2023-08-07,0.600000
2026-08-10,0.757000
2014-05-07,0.270000
2015-05-07,0.390000
2015-11-06,0.480000
2022-08-05,0.550000
2022-11-07,0.550000
2014-02-07,0.270000
2021-08-06,0.501000
2022-02-07,0.501000
2017-11-07,0.420000
2018-05-10,0.468000
2023-05-05,0.580000
2023-11-07,0.600000
2024-05-07,0.650000
2014-11-07,0.330000
2014-12-29,0.033000
2015-02-06,0.330000
2019-02-07,0.507000
2024-02-07,0.600000
2025-12-30,0.081000
2015-08-07,0.480000
2016-08-05,0.450000
2021-11-05,0.501000
2013-12-27,0.063000
2018-02-08,0.444000
2024-11-07,0.652000
2017-12-28,0.057000
2021-05-07,0.521000
2021-12-30,0.023000