f/overrides/event-backup/gsbux-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
2024-05-30,0.101000
2026-01-29,0.076000
2020-09-29,0.082000
2025-04-29,0.119000
2021-06-29,0.084000
2020-10-29,0.067000
2024-01-30,0.067000
2025-05-29,0.100000
2025-12-11,0.316000
2018-06-28,0.068000
2022-09-29,0.080000
2023-05-30,0.089000
2025-02-27,0.094000
2020-01-30,0.037000
2017-12-28,0.063000
2023-01-30,0.062000
2024-06-27,0.091000
2017-07-31,0.061000
2018-07-30,0.083000
2021-07-29,0.074000
2023-03-30,0.112000
2025-10-30,0.098000
2017-10-31,0.063000
2022-10-28,0.076000
2023-11-29,0.081000
2024-02-28,0.091000
2016-04-28,0.053000
2020-11-27,0.060000
2023-12-22,0.101000
2024-10-30,0.099000
2019-07-30,0.077000
2021-12-10,0.933000
2025-08-28,0.097000
2026-02-26,0.093000
2026-07-30,0.102000
2018-09-27,0.067000
2017-03-30,0.093000
2017-04-28,0.044000
2019-11-27,0.067000
2020-04-29,0.077000
2015-11-27,0.078000
2018-10-30,0.059000
2020-07-30,0.071000
2024-04-29,0.098000
2018-02-28,0.087000
2019-12-30,0.102000
2024-08-29,0.107000
2015-12-30,0.085000
2016-09-29,0.070000
2017-06-30,0.083000
2018-01-31,0.069000
2019-04-29,0.070000
2022-02-25,0.065000
2022-05-27,0.073000
2025-11-26,0.084000
2016-08-30,0.077000
2018-12-28,0.068000
2020-02-27,0.076000
2017-02-27,0.114000
2017-11-30,0.095000
2021-12-30,0.087000
2022-08-30,0.082000
2016-03-30,0.077000
2019-02-27,0.085000
2019-05-30,0.083000
2021-02-25,0.065000
2021-03-30,0.092000
2016-11-29,0.088000
2022-12-29,0.155000
2024-03-27,0.094000
2024-09-27,0.097000
2025-06-27,0.100000
2020-06-29,0.063000
2019-10-30,0.071000
2020-05-28,0.081000
2021-08-30,0.079000
2022-04-28,0.076000
2024-12-30,0.111000
2019-06-27,0.074000
2022-11-29,0.078000
2015-09-29,0.085000
2016-07-28,0.064000
2018-04-30,0.072000
2019-03-28,0.085000
2020-03-30,0.082000
2021-01-28,0.056000
2023-02-27,0.081000
2016-01-28,0.066000
2026-06-29,0.101000
2019-09-27,0.067000
2018-08-31,0.087000
2020-08-28,0.074000
2021-10-28,0.080000
2023-10-30,0.085000
2024-07-30,0.087000
2025-01-30,0.081000
2018-08-30,0.087000
2025-03-28,0.089000
2025-07-30,0.100000
2026-03-30,0.099000
2024-11-27,0.083000
2020-12-30,0.089000
2023-06-29,0.100000
2018-05-30,0.099000
2017-05-30,0.090000
2023-04-27,0.093000
2026-04-29,0.110000
2016-06-29,0.081000
2019-01-30,0.069000
2022-03-30,0.119000
2023-07-28,0.080000
2016-05-27,0.079000
2025-09-29,0.100000
2021-09-29,0.080000
2017-01-30,0.027000
2017-04-27,0.044000
2017-09-28,0.069000
2023-08-30,0.099000
2015-08-28,0.091000
2017-08-31,0.093000
2018-11-29,0.093000
2022-01-28,0.060000
2022-06-29,0.085000
2016-10-28,0.063000
2018-03-29,0.071000
2017-09-29,0.069000
2019-08-29,0.088000
2021-05-27,0.071000
2021-11-29,0.065000
2022-07-28,0.072000
2024-12-12,0.124000
2016-02-26,0.092000
2016-12-29,0.105000
2021-04-29,0.075000
2023-09-28,0.085000
2025-12-30,0.123000
2026-05-28,0.096000
2015-10-29,0.076000