f/overrides/event-backup/fsrnx-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
2019-06-07,0.129000
2021-09-03,0.029000
2017-06-02,0.090000
2020-06-05,0.070000
2021-03-05,0.001000
2013-06-07,0.061000
2015-09-11,0.097000
2016-12-16,0.252000
2019-12-20,0.251000
2024-09-06,0.135000
2012-09-07,0.080000
2016-09-09,0.244000
2019-09-06,0.264000
2022-12-16,0.205000
2017-09-08,0.183000
2020-09-04,0.114000
2022-09-09,0.174000
2014-06-06,0.063000
2015-06-05,0.088000
2012-03-02,0.022000
2012-06-01,0.046000
2012-12-14,0.100000
2018-06-01,0.106000
2024-06-07,0.088000
2020-03-06,0.010000
2020-12-11,0.290000
2024-12-20,0.237000
2018-03-02,0.077000
2021-12-17,0.220000
2013-12-13,0.130000
2023-09-08,0.129000
2025-12-19,0.234000
2018-12-14,0.263000
2019-03-08,0.021000
2021-06-04,0.001000
2025-09-05,0.130000
2025-06-06,0.084000
2014-12-19,0.164000
2015-12-18,0.159000
2018-09-07,0.188000
2023-12-15,0.233000
2013-03-01,0.040000
2016-06-03,0.094000
2014-09-05,0.147000
2017-03-03,0.010000
2013-09-06,0.111000
2017-12-15,0.162000
2023-06-02,0.087000
2022-06-03,0.007000
2026-06-05,0.111000
2014-03-07,0.025000
2015-03-06,0.033000
2015-12-31,0.010000
2016-03-04,0.020000