f/overrides/event-backup/fskax-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
2011-12-16,0.560000
2013-12-13,0.699000
2014-12-19,0.828000
2015-04-10,0.170000
2018-12-28,0.064000
2021-04-09,0.135000
2022-04-08,0.178000
2025-12-19,1.786000
2013-04-12,0.133000
2023-12-15,1.610000
2012-12-14,0.668000
2018-12-14,1.457000
2023-04-14,0.219000
2026-04-10,0.164000
2012-04-13,0.127000
2016-04-15,0.293000
2017-04-12,0.299000
2018-04-11,0.273000
2019-04-12,0.371000
2023-12-27,0.030000
2024-04-12,0.260000
2014-04-11,0.151000
2017-12-15,1.477000
2019-12-13,1.383000
2020-12-11,1.327000
2021-12-10,1.400000
2022-12-16,1.544000
2025-04-11,0.108000
2015-12-18,1.292000
2016-12-16,1.273000
2020-04-08,0.231000
2024-12-20,1.652000