f/overrides/event-backup/ebnd-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
2018-09-04,0.113000
2021-02-01,0.078000
2021-04-01,0.075000
2021-06-01,0.080000
2025-12-18,0.114000
2018-02-01,0.099000
2019-12-02,0.091000
2022-06-01,0.092000
2023-02-01,0.094000
2011-11-01,0.033000
2020-03-02,0.086000
2020-12-01,0.078000
2022-04-01,0.056000
2011-05-02,0.087000
2024-07-01,0.095000
2013-12-02,0.125000
2019-08-01,0.114000
2020-06-01,0.085000
2021-05-03,0.077000
2026-07-01,0.110000
2018-08-01,0.103000
2023-12-18,0.084000
2023-11-01,0.097000
2017-12-19,0.149000
2020-09-01,0.081000
2023-03-01,0.082000
2017-09-01,0.134000
2018-03-01,0.099000
2021-03-01,0.071000
2021-07-01,0.076000
2022-12-01,0.090000
2025-11-03,0.100000
2013-10-01,0.127000
2021-12-01,0.078000
2025-06-02,0.099000
2019-09-03,0.108000
2023-09-01,0.083000
2022-07-01,0.099000
2022-02-01,0.080000
2012-10-01,0.094000
2017-11-01,0.105000
2019-05-01,0.113000
2020-10-01,0.074000
2021-11-01,0.082000
2022-03-01,0.072000
2024-04-01,0.099000
2011-07-01,0.150000
2025-03-03,0.085000
2019-06-03,0.116000
2011-04-01,0.075000
2018-12-03,0.098000
2019-10-01,0.088000
2020-05-01,0.080000
2018-10-01,0.107000
2021-12-17,0.077000
2022-09-01,0.091000
2022-10-03,0.089000
2023-08-01,0.096000
2017-10-02,0.104000
2020-07-01,0.103000
2013-11-01,0.100000
2013-12-27,0.081000
2018-07-02,0.099000
2019-12-20,0.099000
2023-07-03,0.091000
2023-10-02,0.095000
2024-11-01,0.102000
2013-06-03,0.119000
2025-02-03,0.095000
2025-07-01,0.098000
2022-11-01,0.090000
2026-05-01,0.102000
2024-10-01,0.099000
2025-04-01,0.100000
2013-08-01,0.061000
2018-05-01,0.100000
2018-06-01,0.107000
2019-07-01,0.135000
2024-12-02,0.095000
2012-12-27,0.847000
2018-12-19,0.105000
2020-12-18,0.085000
2022-12-19,0.089000
2023-06-01,0.092000
2026-06-01,0.104000
2013-05-01,0.074000
2012-12-03,0.186000
2018-11-01,0.115000
2024-02-01,0.101000
2025-05-01,0.095000
2025-09-02,0.104000
2012-08-01,0.088000
2024-08-01,0.099000
2025-08-01,0.100000
2020-11-02,0.085000
2011-08-01,0.114000
2011-12-28,0.136000
2024-12-19,0.075000
2025-10-01,0.096000
2011-06-01,0.119000
2019-03-01,0.099000
2020-04-01,0.101000
2022-05-02,0.038000
2023-04-03,0.127000
2025-12-01,0.098000
2011-12-01,0.105000
2023-05-01,0.080000
2024-09-03,0.097000
2026-04-01,0.103000
2022-08-01,0.089000
2019-11-01,0.102000
2021-10-01,0.078000
2012-09-04,0.132000
2018-04-02,0.101000
2020-08-03,0.081000
2023-12-01,0.098000
2024-05-01,0.096000
2024-06-03,0.101000
2014-02-03,0.067000
2020-02-03,0.091000
2021-08-02,0.082000
2026-08-03,0.107000
2017-12-01,0.103000
2021-09-01,0.083000
2026-02-02,0.103000
2019-02-01,0.120000
2024-03-01,0.091000
2026-03-02,0.091000
2019-04-01,0.122000