f/overrides/event-backup/hacsx-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
2012-12-17,0.115000
2013-09-26,0.043000
2015-12-17,0.338000
2017-09-28,0.038000
2022-06-29,0.004000
2026-03-31,0.055000
2020-06-29,0.014000
2012-09-27,0.046000
2015-03-30,0.035000
2017-06-29,0.031000
2021-12-20,1.661000
2023-06-30,0.103000
2026-06-30,0.067000
2012-06-28,0.055000
2013-03-28,0.038000
2014-03-27,0.037000
2016-12-19,0.065000
2019-09-26,0.021000
2024-12-20,0.141000
2011-12-16,0.091000
2018-09-27,0.021000
2013-06-27,0.029000
2014-09-25,0.038000
2017-12-18,1.022000
2019-03-28,0.022000
2019-12-16,0.366000
2016-06-29,0.027000
2014-12-18,0.539000
2018-03-28,0.021000
2013-12-17,0.205000
2020-12-17,1.240000
2015-06-29,0.033000
2015-09-24,0.032000
2018-12-17,0.593000
2021-03-30,0.003000
2025-03-31,0.058000
2016-03-30,0.025000
2016-09-29,0.023000
2020-09-29,0.012000
2022-12-19,0.059000
2024-03-28,0.087000
2024-06-28,0.091000
2025-12-19,0.109000
2011-09-29,0.037000
2012-03-29,0.053000
2018-06-28,0.021000
2019-06-27,0.023000
2022-03-30,0.004000
2023-09-29,0.102000
2017-03-30,0.038000
2020-03-30,0.017000
2025-06-30,0.078000
2022-09-29,0.012000
2023-03-31,0.069000
2023-12-19,0.071000
2014-06-26,0.032000
2024-09-30,0.086000
2025-09-30,0.056000