f/overrides/event-backup/blpax-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
2022-06-28,0.070000
2022-12-28,0.714000
2023-03-29,0.056000
2014-06-25,0.052000
2017-03-23,0.030000
2013-03-27,0.037000
2015-09-24,0.032000
2025-06-25,0.090000
2025-09-25,0.086000
2018-09-25,0.065000
2025-12-29,0.983000
2013-09-26,0.039000
2013-12-27,0.088000
2015-06-25,0.043000
2017-09-21,0.054000
2012-06-27,0.035000
2021-12-29,0.751000
2023-09-27,0.076000
2014-03-26,0.044000
2014-09-25,0.038000
2017-12-27,0.383000
2020-09-25,0.058000
2020-12-23,0.276000
2012-09-26,0.025000
2012-12-27,0.082000
2018-06-26,0.061000
2019-06-25,0.064000
2019-03-26,0.038000
2021-03-29,0.049000
2023-12-27,0.191000
2016-06-23,0.040000
2018-03-26,0.035000
2024-09-25,0.078000
2024-12-27,0.433000
2015-12-29,0.365000
2018-12-27,0.471000
2025-03-26,0.054000
2016-03-24,0.029000
2022-03-29,0.053000
2023-06-28,0.063000
2026-03-26,0.051000
2026-06-25,0.105000
2014-12-29,0.165000
2015-03-25,0.034000
2019-09-25,0.064000
2021-06-28,0.060000
2016-12-28,0.367000
2020-03-26,0.040000
2024-03-25,0.050000
2013-06-26,0.050000
2016-09-22,0.044000
2017-06-22,0.049000
2019-12-27,0.429000
2020-06-25,0.065000
2022-09-28,0.071000
2024-06-25,0.088000
2021-09-28,0.061000