f/overrides/event-backup/amlp-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
2019-08-08,0.950000
2011-05-06,1.230000
2012-11-07,1.280000
2014-02-06,1.390000
2022-11-09,0.750000
2020-08-13,0.750000
2013-11-07,1.370000
2014-11-06,1.445000
2018-08-09,1.035000
2019-02-14,0.975000
2015-02-11,1.460000
2015-08-12,1.495000
2017-11-09,1.025000
2016-02-10,1.495000
2023-02-09,0.770000
2024-11-13,0.950000
2011-02-07,1.215000
2017-08-09,1.075000
2022-08-11,0.740000
2023-08-10,0.830000
2021-05-13,0.680000
2024-08-08,0.940000
2017-02-08,1.125000
2019-11-14,0.975000
2025-02-12,0.970000
2026-05-13,1.030000
2016-05-11,1.200000
2021-11-10,0.760000
2022-05-12,0.730000
2015-05-13,1.480000
2020-02-13,0.950000
2023-05-11,0.860000
2025-05-14,0.980000
2020-11-12,0.710000
2023-11-09,0.880000
2024-02-08,0.880000
2026-02-11,1.010000
2010-11-05,1.240000
2018-05-10,1.035000
2018-11-08,0.955000
2020-05-07,0.750000
2012-05-07,1.225000
2013-08-07,1.345000
2012-02-07,1.215000
2012-08-07,1.260000
2025-08-13,0.980000
2026-08-12,1.030000
2013-02-07,1.305000
2017-05-10,1.075000
2021-08-12,0.680000
2014-05-06,1.395000
2016-08-10,1.200000
2019-05-09,0.975000
2021-02-11,0.680000
2016-11-09,1.200000
2018-02-08,1.035000
2022-02-10,0.710000
2024-05-09,0.940000
2011-08-05,1.265000
2011-11-07,1.290000
2013-05-07,1.320000
2014-08-06,1.420000
2025-11-12,1.000000