f/overrides/event-backup/amlpx-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
2014-07-24,0.158000
2017-01-24,0.158000
2020-10-20,0.100000
2021-04-20,0.100000
2021-10-20,0.100000
2026-01-20,0.125000
2011-11-01,0.158000
2015-10-26,0.158000
2019-04-23,0.158000
2021-01-19,0.100000
2023-07-18,0.100000
2023-04-18,0.100000
2025-01-21,0.110000
2016-04-26,0.158000
2021-07-20,0.100000
2024-01-16,0.100000
2025-07-15,0.110000
2025-10-21,0.125000
2012-04-24,0.158000
2015-07-24,0.158000
2026-04-21,0.145000
2012-01-24,0.158000
2013-07-24,0.158000
2024-04-16,0.110000
2019-01-22,0.158000
2019-07-23,0.158000
2026-07-21,0.145000
2014-01-24,0.158000
2014-10-24,0.158000
2017-07-25,0.158000
2018-04-24,0.158000
2019-10-22,0.158000
2020-01-21,0.158000
2020-04-21,0.100000
2012-07-24,0.158000
2017-04-25,0.158000
2024-07-16,0.110000
2011-08-01,0.158000
2014-04-24,0.158000
2016-10-26,0.158000
2018-07-24,0.158000
2022-04-19,0.100000
2012-10-24,0.158000
2018-01-25,0.158000
2022-01-18,0.100000
2023-01-17,0.100000
2023-10-17,0.100000
2024-10-16,0.110000
2013-01-24,0.158000
2015-01-28,0.158000
2015-04-24,0.158000
2022-07-19,0.100000
2013-04-24,0.158000
2016-01-26,0.158000
2017-10-24,0.158000
2018-10-23,0.158000
2013-10-24,0.158000
2016-07-26,0.158000
2020-07-21,0.100000
2022-10-18,0.100000
2025-04-15,0.110000