f/overrides/event-backup/iwy-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
2025-06-16,0.242000
2026-06-15,0.272000
2011-03-24,0.104000
2013-03-25,0.151000
2017-07-06,0.248000
2021-09-24,0.259000
2024-06-11,0.194000
2016-03-23,0.192000
2019-09-24,0.267000
2011-07-05,0.139000
2011-09-23,0.099000
2012-12-19,0.215000
2014-03-25,0.162000
2015-03-25,0.202000
2017-03-24,0.191000
2020-06-15,0.196000
2011-12-22,0.145000
2012-06-26,0.136000
2014-12-24,0.188000
2015-12-24,0.220000
2018-07-03,0.258000
2014-07-02,0.210000
2018-12-28,0.015000
2019-06-17,0.272000
2025-09-16,0.260000
2019-12-16,0.255000
2021-03-25,0.216000
2026-03-17,0.201000
2009-12-23,0.109000
2013-09-24,0.158000
2015-07-02,0.235000
2017-12-21,0.280000
2025-12-16,0.266000
2022-09-26,0.334000
2023-12-20,0.387000
2010-03-24,0.076000
2010-09-23,0.091000
2012-03-23,0.120000
2014-09-24,0.167000
2018-03-22,0.203000
2024-09-25,0.303000
2018-09-26,0.216000
2019-03-20,0.228000
2021-06-10,0.173000
2022-03-24,0.229000
2023-03-23,0.267000
2012-09-24,0.153000
2018-12-17,0.252000
2022-12-13,0.299000
2024-12-17,0.250000
2013-07-02,0.197000
2016-12-22,0.226000
2021-12-13,0.226000
2023-06-07,0.235000
2010-12-22,0.098000
2015-09-25,0.189000
2016-09-26,0.187000
2017-09-26,0.203000
2020-03-25,0.250000
2016-07-06,0.247000
2020-12-14,0.254000
2022-06-09,0.197000
2010-07-02,0.114000
2023-09-26,0.297000
2013-12-23,0.200000
2020-09-23,0.247000
2024-03-21,0.249000
2025-03-18,0.237000