f/overrides/event-backup/ihf-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
2010-09-23,0.003800
2014-03-25,0.008400
2016-03-23,0.011200
2024-09-25,0.174000
2013-12-23,0.010600
2014-06-24,0.011400
2015-06-24,0.009600
2020-12-14,0.055000
2022-06-09,0.034000
2023-03-23,0.099000
2012-09-25,0.008000
2024-06-11,0.027000
2011-03-25,0.000600
2011-09-23,0.005000
2016-09-26,0.014200
2019-12-16,0.083000
2007-06-28,0.107400
2021-09-24,0.136800
2026-03-17,0.139000
2017-06-27,0.015800
2018-06-26,0.016800
2018-12-28,1.242400
2021-06-10,0.034800
2024-12-17,0.105000
2025-06-16,0.060000
2011-12-22,0.006600
2013-06-26,0.008000
2017-09-26,0.014400
2018-12-17,0.019000
2020-06-15,0.034800
2021-12-13,0.072000
2018-03-22,0.023400
2019-03-20,0.025000
2010-12-22,0.016200
2012-06-19,0.005800
2013-03-25,0.007800
2013-09-24,0.017400
2015-03-25,0.007800
2015-09-25,0.006600
2022-03-24,0.085400
2007-03-23,0.063000
2023-06-07,0.024200
2017-12-19,0.019000
2019-06-17,0.025400
2026-06-15,0.049000
2012-03-26,0.027200
2012-12-19,0.083600
2020-03-25,0.059800
2024-03-21,0.105000
2015-12-24,0.026600
2021-03-25,0.084000
2022-09-26,0.133600
2023-09-26,0.191200
2025-12-16,0.224000
2014-12-24,0.015000
2016-12-21,0.020800
2017-03-24,0.010200
2019-09-24,0.099600
2025-03-18,0.108000
2011-06-24,0.003800
2016-06-21,0.017600
2018-09-26,0.022000
2020-09-23,0.100800
2022-12-13,0.426600
2025-09-16,0.110000
2014-09-24,0.008400
2023-12-20,0.302800