f/overrides/event-backup/ftrcx-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
2022-09-30,0.018000
2013-06-26,0.152000
2014-03-27,0.004000
2014-12-30,0.508000
2022-06-15,0.349000
2021-12-30,2.249000
2024-09-30,0.034000
2009-12-29,0.060000
2010-03-29,0.003000
2012-12-28,0.087000
2015-03-27,0.008000
2025-06-16,0.525000
2013-03-26,0.001000
2016-06-28,0.179000
2018-06-27,0.158000
2018-12-28,0.447000
2016-12-29,0.006000
2020-06-26,0.303000
2023-03-31,0.064000
2023-09-29,0.040000
2007-03-15,0.003000
2007-12-28,0.139000
2011-03-29,0.015000
2016-03-29,0.004000
2023-12-28,0.073000
2012-03-28,0.012000
2015-12-30,0.330000
2022-06-30,0.022000
2020-09-28,0.017000
2023-06-15,0.037000
2024-06-17,0.007000
2008-03-17,0.002000
2010-12-29,0.095000
2013-12-30,0.340000
2015-06-26,0.227000
2019-03-27,0.007000
2018-09-26,0.019000
2019-06-26,0.168000
2008-12-29,0.041000
2017-03-29,0.087000
2019-12-30,0.231000
2006-12-28,0.122000
2017-12-28,0.099000
2021-06-28,0.262000
2024-12-30,0.197000
2026-06-15,0.451000
2011-12-28,0.069000
2021-09-28,0.010000
2023-06-30,0.048000
2024-06-28,0.041000
2025-12-30,0.523000
2014-06-26,0.223000
2019-09-26,0.018000
2021-03-29,0.005000
2024-03-28,0.022000
2009-03-31,0.015000
2009-09-28,0.010000
2018-03-27,0.022000
2020-12-30,0.149000
2022-12-29,0.006000