f/overrides/event-backup/dfvqx-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
2014-06-09,0.162000
2016-12-14,0.108000
2022-09-29,0.112000
2010-09-08,0.027000
2012-09-10,0.033000
2012-12-12,0.101000
2015-09-09,0.042000
2022-03-30,0.028000
2009-06-09,0.089000
2015-06-08,0.152000
2017-12-14,0.201000
2019-09-27,0.053000
2017-03-30,0.001000
2020-12-14,0.093000
2024-09-27,0.122000
2021-09-29,0.067000
2022-06-29,0.112000
2024-12-13,0.165000
2011-09-08,0.056000
2013-12-11,0.157000
2018-06-28,0.102000
2016-03-30,0.042000
2017-09-28,0.049000
2021-03-30,0.024000
2021-06-29,0.105000
2022-12-12,0.072000
2024-03-27,0.020000
2012-06-08,0.139000
2014-12-15,0.177000
2019-03-28,0.001000
2020-06-29,0.094000
2023-12-13,0.195000
2010-12-09,0.140000
2015-12-15,0.096000
2018-12-17,0.466000
2025-09-29,0.135000
2017-06-29,0.142000
2019-12-16,0.099000
2025-12-15,0.219000
2009-12-09,0.035000
2011-03-08,0.020000
2019-06-27,0.173000
2020-09-29,0.040000
2024-06-27,0.174000
2025-03-28,0.030000
2009-03-10,0.008000
2013-09-10,0.027000
2016-06-29,0.141000
2025-06-27,0.198000
2013-06-10,0.152000
2014-09-09,0.045000
2021-12-13,0.467000
2023-03-30,0.019000
2023-09-28,0.078000
2009-09-09,0.028000
2011-06-08,0.143000
2014-03-10,0.021000
2026-03-30,0.034000
2026-06-29,0.225000
2011-12-13,0.236000
2012-03-08,0.010000
2020-03-30,0.001000
2008-12-10,0.026000
2013-03-08,0.006000
2016-09-29,0.026000
2018-09-27,0.053000
2023-06-29,0.171000