f/overrides/event-backup/mdyv-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
2023-06-20,0.330000
2008-03-20,0.166500
2012-09-21,0.130500
2018-06-18,0.249000
2019-12-23,0.313000
2007-12-21,0.163000
2014-12-19,1.238000
2019-03-18,0.183000
2018-09-24,0.233000
2019-06-24,0.259000
2023-03-20,0.241000
2011-06-17,0.113000
2011-12-16,0.136000
2014-06-20,0.170000
2016-03-18,0.172500
2013-03-15,0.090500
2022-12-19,0.329000
2024-12-23,0.478000
2006-06-16,0.158000
2007-03-16,0.116000
2011-03-18,0.086500
2012-12-21,0.254000
2017-03-17,0.166500
2021-03-22,0.295000
2023-12-18,0.302000
2022-03-21,0.248000
2025-12-22,0.394000
2008-06-20,0.194000
2016-06-17,0.200500
2018-03-19,0.236500
2018-12-24,0.293000
2024-06-24,0.390000
2024-09-23,0.360000
2025-06-23,0.420000
2006-09-15,0.137500
2012-03-16,0.108500
2013-09-20,0.151500
2024-03-18,0.285000
2009-09-18,0.137000
2014-03-21,0.143500
2016-09-16,0.220500
2019-09-23,0.250000
2017-06-16,0.222000
2022-06-21,0.335000
2025-03-24,0.246000
2026-06-22,0.421000
2010-06-18,0.151000
2013-12-20,0.157000
2015-03-20,0.098000
2015-09-18,0.193500
2010-03-19,0.119000
2020-06-22,0.252000
2022-09-19,0.320000
2025-09-22,0.394000
2014-09-19,0.174500
2015-06-19,0.193500
2020-03-23,0.293000
2021-12-20,0.390000
2006-12-15,0.637500
2009-03-20,0.150500
2011-09-16,0.116000
2013-06-21,0.156500
2021-06-21,0.315000
2005-12-16,0.081500
2010-12-17,0.194000
2015-12-18,1.125500
2017-12-15,0.686000
2006-03-17,0.111500
2007-09-21,0.155000
2012-06-15,0.130000
2007-06-15,0.168500
2008-12-19,0.185000
2016-12-16,0.267000
2023-09-18,0.293000
2020-09-21,0.153000
2020-12-21,0.243000
2008-09-19,0.211500
2009-06-19,0.140000
2009-12-18,0.118000
2017-09-15,0.201500
2010-09-17,0.143500
2026-03-23,0.380000