f/overrides/event-backup/jpyrx-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
2020-12-31,0.173000
2014-12-31,0.137000
2017-03-31,0.067000
2014-03-31,0.060000
2015-12-31,0.168000
2019-12-16,0.098000
2019-12-31,0.195000
2020-12-15,0.022000
2022-12-30,0.558000
2012-12-31,0.133000
2013-09-30,0.047000
2023-12-29,0.693000
2019-03-29,0.079000
2019-09-30,0.104000
2020-03-31,0.085000
2021-03-31,0.091000
2021-09-30,0.102000
2024-12-31,0.822000
2016-03-31,0.065000
2016-09-30,0.080000
2016-06-30,0.132000
2017-12-29,0.208000
2018-03-29,0.076000
2018-09-28,0.098000
2020-06-30,0.083000
2013-12-31,0.141000
2015-03-31,0.060000
2014-12-17,0.065000
2018-12-31,0.187000
2012-09-28,0.114000
2013-03-28,0.059000
2019-06-28,0.192000
2020-09-30,0.111000
2021-06-30,0.160000
2021-12-15,0.934000
2025-12-31,1.009000
2015-06-30,0.125000
2015-09-30,0.072000
2015-12-18,0.009000
2017-06-30,0.137000
2017-09-29,0.094000
2014-06-30,0.143000
2014-09-30,0.072000
2016-12-30,0.180000
2018-06-29,0.180000
2018-12-14,0.681000
2021-12-31,0.351000
2013-06-28,0.052000
2013-12-18,0.018000