f/overrides/event-backup/idlv-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
2013-09-20,0.165000
2016-09-16,0.210000
2019-03-18,0.142000
2023-06-20,0.275000
2025-03-24,0.229000
2015-03-20,0.096000
2020-03-23,0.236000
2021-06-21,0.224000
2022-09-19,0.307000
2012-12-21,0.351000
2015-12-18,0.505000
2018-09-24,0.272000
2022-06-21,0.546000
2025-12-22,0.637000
2026-06-22,0.519000
2016-03-18,0.062000
2025-09-22,0.301000
2014-09-19,0.178000
2020-12-21,0.062000
2021-12-20,0.282000
2024-12-23,0.186000
2014-06-20,0.406000
2017-06-16,0.312000
2024-09-23,0.219000
2019-09-23,0.316000
2023-12-18,0.193000
2012-06-15,0.120000
2016-12-16,0.510000
2025-06-23,0.402000
2018-12-24,0.325000
2024-06-24,0.338000
2012-09-21,0.103000
2024-03-18,0.205000
2013-12-20,0.305000
2014-03-21,0.124000
2023-03-20,0.316000
2026-03-23,0.280000
2012-03-16,0.130000
2013-03-15,0.097000
2019-06-24,0.405000
2014-12-19,0.298000
2017-03-17,0.044000
2017-09-18,0.210000
2021-03-22,0.228000
2022-12-19,0.167000
2023-09-18,0.228000
2015-06-19,0.349000
2016-06-17,0.334000
2017-12-18,0.460000
2018-06-18,0.481000
2019-12-23,1.006000
2020-06-22,0.191000
2013-06-21,0.211000
2015-09-18,0.173000
2018-03-19,0.098000
2022-03-21,0.236000