f/overrides/event-backup/ksdvx-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
2020-03-27,0.090000
2023-06-28,0.024000
2023-09-27,0.137000
2012-06-29,0.074000
2012-12-31,0.534000
2010-09-30,0.030000
2014-12-29,0.072000
2015-06-30,0.072000
2016-09-30,0.069000
2016-12-15,0.305000
2023-03-29,0.168000
2017-09-29,0.032000
2021-03-29,0.043000
2021-12-29,2.113000
2016-06-30,0.079000
2016-12-27,0.075000
2017-12-15,1.127000
2019-03-27,0.093000
2020-06-26,0.034000
2024-06-26,0.081000
2025-03-27,0.065000
2010-12-31,0.432000
2022-03-29,0.081000
2025-09-26,0.071000
2011-12-30,0.347000
2013-06-28,0.041000
2015-12-28,0.088000
2018-09-28,0.036000
2022-09-28,0.129000
2022-12-28,1.936000
2025-12-29,0.593000
2013-09-30,0.051000
2014-03-31,0.046000
2014-09-30,0.055000
2023-12-27,0.511000
2024-09-26,0.076000
2011-03-31,0.021000
2016-03-31,0.093000
2018-06-29,0.066000
2024-03-26,0.049000
2026-06-26,0.088000
2011-06-30,0.039000
2015-09-30,0.039000
2015-12-16,0.644000
2019-12-27,0.080000
2020-09-28,0.059000
2012-03-30,0.045000
2014-06-30,0.066000
2022-06-28,0.068000
2018-03-29,0.086000
2019-06-06,0.313000
2024-12-27,1.648000
2025-06-26,0.074000
2026-03-27,0.125000
2017-12-28,0.060000
2021-06-28,0.047000
2011-09-30,0.049000
2012-09-28,0.034000
2013-12-31,0.624000
2018-11-28,1.419000
2019-09-26,0.109000
2021-09-28,0.050000
2013-03-28,0.045000
2014-12-15,0.913000
2015-03-31,0.078000
2017-03-31,0.075000
2017-06-30,0.060000
2020-12-29,0.074000