f/overrides/event-backup/dxjs-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
2015-12-21,0.549260
2020-12-21,0.271790
2021-12-27,0.398670
2013-12-24,0.031900
2022-06-24,0.302500
2016-12-23,0.100920
2018-06-25,0.379490
2023-03-27,0.245000
2025-12-26,0.239810
2026-03-26,0.055000
2026-06-25,0.340000
2015-06-22,0.064465
2022-12-23,0.280720
2024-09-25,0.015000
2025-06-25,0.575000
2025-09-25,0.010000
2017-06-26,0.270000
2023-06-26,0.222520
2023-12-22,0.340000
2017-12-26,0.080475
2016-06-20,0.197500
2019-06-24,0.217420
2019-09-24,0.005000
2014-06-23,0.119300
2020-06-23,0.334585
2021-09-24,0.005000
2024-03-22,0.250000
2024-06-25,0.099100
2019-12-23,0.238650
2017-09-26,0.000595
2021-06-24,0.237265
2024-12-26,1.024700
2014-12-19,1.197360