f/overrides/event-backup/einc-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
2025-02-03,0.471000
2012-08-15,6.075000
2013-08-14,6.150000
2016-08-15,1.800000
2020-05-11,0.575000
2015-08-13,4.650000
2020-02-10,0.855000
2024-11-01,0.665000
2025-11-03,0.685000
2018-02-12,2.250000
2021-08-16,1.297000
2023-02-01,0.562000
2023-05-01,0.535000
2014-02-12,6.165000
2016-05-16,1.500000
2021-05-17,0.744000
2019-02-11,1.326000
2024-02-01,0.628000
2018-08-13,1.260000
2018-11-09,1.020000
2021-11-15,0.782000
2026-02-02,0.542000
2013-02-13,6.150000
2014-05-14,5.700000
2017-02-13,1.620000
2015-02-13,5.700000
2017-11-13,1.269000
2024-08-01,0.765000
2025-12-29,0.984000
2022-08-01,0.427000
2026-05-01,0.807000
2026-08-03,2.011000
2013-05-15,6.150000
2017-05-15,1.584000
2019-05-13,1.398000
2020-08-10,0.660000
2025-05-01,1.009000
2012-11-14,6.075000
2013-11-13,6.165000
2014-11-12,5.700000
2015-05-14,5.250000
2024-05-01,1.076000
2016-02-12,2.850000
2019-08-12,1.500000
2023-08-01,1.112000
2023-11-01,0.378000
2020-11-09,0.657000
2022-02-01,0.303000
2015-11-12,4.425000
2017-08-14,1.500000
2022-11-01,0.313000
2025-08-01,1.193000
2018-05-14,1.290000
2019-11-12,1.071000
2021-02-17,0.394000
2014-08-13,5.700000
2022-05-02,0.743000