f/overrides/event-backup/mlpa-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
2022-11-07,0.770000
2024-05-07,0.900000
2015-08-07,1.440000
2015-11-06,1.350000
2016-08-05,1.194000
2017-02-07,1.194000
2020-02-07,1.098000
2013-02-08,1.416000
2021-05-07,0.775000
2024-08-07,0.900000
2026-05-11,1.020000
2026-08-10,1.020000
2019-11-07,1.062000
2021-11-05,0.725000
2021-02-05,0.825000
2023-08-07,0.840000
2014-11-07,1.500000
2016-02-05,1.350000
2020-05-07,0.900000
2020-08-07,0.900000
2026-02-09,1.000000
2013-08-09,1.344000
2017-05-05,1.194000
2017-08-07,1.194000
2018-11-08,1.122000
2019-02-07,1.092000
2025-11-07,0.980000
2013-11-07,1.284000
2014-08-07,1.410000
2017-11-07,1.194000
2019-08-07,1.062000
2024-11-07,0.910000
2012-10-01,1.452000
2018-08-09,1.140000
2015-05-07,1.500000
2018-02-08,1.194000
2022-08-05,0.770000
2024-02-07,0.870000
2013-05-09,1.416000
2014-05-07,1.320000
2018-05-10,1.158000
2023-11-07,0.870000
2025-08-07,0.935000
2025-02-07,0.935000
2016-11-07,1.194000
2019-05-07,1.092000
2021-08-06,0.725000
2022-02-07,0.725000
2023-05-05,0.840000
2012-07-02,1.044000
2014-02-07,1.320000
2015-02-06,1.500000
2016-05-06,1.230000
2020-11-06,0.900000
2025-05-07,0.935000
2022-05-06,0.750000
2023-02-07,0.770000