f/overrides/event-backup/brgkx-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
2020-12-10,0.083000
2026-03-31,0.116000
2012-06-29,0.048000
2019-06-28,0.159000
2024-06-28,0.102000
2011-06-30,0.043000
2019-12-12,0.254000
2011-09-30,0.037000
2012-09-28,0.054000
2014-03-31,0.057000
2015-09-30,0.068000
2017-06-30,0.060000
2021-03-31,0.107000
2013-03-28,0.054000
2017-03-31,0.074000
2018-06-29,0.082000
2020-03-31,0.094000
2021-06-30,0.108000
2023-03-31,0.133000
2012-03-30,0.048000
2012-12-31,0.174000
2015-03-31,0.064000
2015-12-30,0.542000
2016-09-30,0.069000
2016-12-16,0.434000
2022-09-30,0.105000
2025-12-16,0.570000
2014-09-30,0.065000
2022-07-14,0.078000
2024-12-12,0.193000
2013-06-28,0.075000
2020-06-30,0.114000
2023-09-29,0.097000
2013-09-30,0.057000
2020-09-30,0.086000
2021-09-30,0.091000
2016-06-30,0.102000
2017-12-15,0.256000
2021-12-09,0.301000
2022-06-30,0.094000
2025-03-31,0.112000
2011-12-30,0.050000
2014-06-30,0.115000
2015-06-30,0.095000
2017-09-29,0.079000
2018-12-14,0.154000
2023-12-14,0.119000
2025-09-30,0.123000
2018-03-29,0.078000
2019-03-28,0.092000
2025-06-30,0.377000
2026-06-30,0.166000
2013-12-31,0.435000
2014-12-31,0.287000
2018-09-28,0.092000
2024-03-28,0.107000
2016-03-31,0.072000
2019-09-27,0.088000
2022-03-31,0.094000
2023-06-30,0.106000
2024-09-30,0.116000
2022-12-13,0.076000