f/overrides/event-backup/fdgkx-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
2019-12-20,0.479000
2022-04-01,0.056000
2025-04-04,0.033000
2011-09-09,0.106000
2013-12-13,0.981000
2015-09-11,2.476000
2015-12-11,0.386000
2018-09-14,5.098000
2022-07-01,0.142000
2022-09-09,2.706000
2022-10-07,0.154000
2009-09-11,0.122000
2009-12-11,0.086000
2017-12-08,3.588000
2019-09-13,1.053000
2020-12-18,0.232000
2023-07-07,0.129000
2024-09-13,2.515000
2016-09-16,0.295000
2024-04-05,0.071000
2026-07-10,0.171000
2018-12-07,0.737000
2021-09-10,2.120000
2022-12-22,0.303000
2008-12-12,0.193000
2010-09-08,0.159000
2010-12-10,0.115000
2014-12-12,1.007000
2016-12-09,0.251000
2023-09-08,0.504000
2024-07-05,0.124000
2024-12-26,0.920000
2008-09-12,1.219000
2011-12-09,0.078000
2023-10-06,0.169000
2023-12-21,0.309000
2021-12-17,0.770000
2025-07-11,0.108000
2025-12-26,1.107000
2012-09-07,0.241000
2012-12-14,0.608000
2013-09-06,2.663000
2017-09-15,2.090000
2020-09-11,0.382000
2023-04-05,0.065000
2025-10-03,0.255000
2026-04-01,0.111000
2014-09-12,5.044000
2024-10-04,0.138000
2025-08-07,2.500000