f/overrides/event-backup/flql-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
2022-09-16,0.212000
2023-06-23,0.194000
2024-09-20,0.167000
2024-12-20,0.236000
2026-06-26,0.224000
2017-06-20,0.007000
2021-09-13,0.218000
2022-03-10,0.120000
2022-12-16,0.294000
2019-06-11,0.093000
2019-09-11,0.219000
2020-03-11,0.108000
2021-03-11,0.131000
2026-03-20,0.154000
2018-03-20,0.089000
2018-06-20,0.106000
2020-06-11,0.107000
2020-09-14,0.304000
2021-12-13,0.320000
2022-06-17,0.186000
2024-03-15,0.106000
2024-06-21,0.153000
2017-09-20,0.158000
2017-12-20,0.187000
2018-12-20,0.209000
2020-12-14,0.235000
2021-06-10,0.183000
2023-12-15,0.224000
2025-06-27,0.211000
2018-09-20,0.099000
2023-03-17,0.142000
2019-12-30,0.007000
2025-03-21,0.133000
2025-09-19,0.163000
2025-12-19,0.258000
2019-03-20,0.056000
2019-12-11,0.248000
2023-09-15,0.155000