f/overrides/event-backup/ewx-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
2021-06-21,0.449000
2022-06-21,0.632000
2011-06-17,0.178000
2013-06-21,0.373000
2013-12-20,0.708000
2017-12-15,1.038000
2020-06-22,0.351000
2020-12-21,0.808000
2024-06-24,0.448000
2008-12-19,0.212000
2012-06-15,0.365000
2014-12-19,0.914000
2019-06-24,0.420000
2025-06-23,0.636000
2026-06-22,0.571000
2016-12-16,0.836000
2017-06-16,0.159000
2024-12-23,1.254000
2010-12-17,1.606000
2018-12-24,0.891000
2022-12-20,0.834000
2023-06-20,0.481000
2009-06-19,0.103000
2009-12-18,0.750000
2021-12-20,1.193000
2011-12-16,1.927000
2016-06-17,0.140000
2012-12-21,0.693000
2015-12-18,0.894000
2018-06-15,0.443000
2025-12-22,1.273000
2010-06-18,0.121000
2014-06-20,0.300000
2015-06-19,0.254000
2019-12-23,0.837000
2023-12-18,0.827000