f/overrides/event-backup/gbil-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
2022-12-27,0.310000
2024-02-01,0.404000
2025-09-02,0.328000
2018-12-03,0.176000
2019-07-01,0.186000
2019-09-03,0.170000
2023-02-01,0.354000
2024-11-01,0.393000
2017-03-01,0.031000
2018-03-01,0.098000
2019-06-03,0.196000
2022-05-03,0.022000
2022-10-03,0.150000
2023-08-01,0.413000
2023-10-02,0.407000
2024-10-01,0.409000
2017-05-01,0.050000
2017-10-02,0.079000
2026-02-02,0.273000
2025-06-02,0.345000
2025-07-01,0.338000
2019-10-01,0.159000
2023-07-03,0.391000
2024-04-01,0.396000
2024-09-03,0.413000
2025-08-01,0.347000
2026-08-03,0.305000
2016-12-01,0.028000
2019-08-01,0.183000
2022-06-01,0.047000
2023-12-27,0.469000
2025-12-01,0.286000
2017-09-01,0.077000
2019-04-01,0.193000
2020-06-01,0.046000
2022-12-01,0.270000
2024-03-01,0.402000
2024-08-01,0.463000
2018-08-01,0.146000
2020-03-02,0.162000
2018-07-02,0.143000
2024-12-02,0.359000
2024-12-31,0.399000
2025-12-31,0.338000
2026-05-01,0.294000
2026-07-01,0.311000
2017-08-01,0.053000
2018-02-01,0.098000
2023-09-01,0.403000
2025-10-01,0.347000
2019-02-01,0.199000
2023-05-01,0.378000
2018-05-01,0.126000
2023-06-01,0.387000
2018-06-01,0.141000
2018-11-01,0.161000
2019-12-27,0.257000
2022-09-01,0.146000
2025-03-03,0.320000
2017-06-01,0.055000
2017-07-03,0.062000
2023-12-01,0.455000
2024-07-01,0.391000
2017-02-01,0.025000
2017-12-27,0.094000
2019-11-01,0.150000
2020-04-01,0.119000
2023-04-03,0.356000
2018-09-04,0.158000
2018-10-01,0.150000
2020-05-01,0.077000
2020-07-01,0.053000
2020-09-01,0.009000
2020-10-01,0.310000
2022-08-01,0.123000
2023-03-01,0.287000
2017-11-01,0.088000
2020-02-03,0.017000
2025-11-03,0.336000
2022-11-01,0.235000
2024-05-01,0.458000
2026-03-02,0.275000
2017-12-01,0.082000
2019-12-02,0.137000
2018-04-02,0.118000
2020-08-03,0.016000
2023-11-01,0.461000
2024-06-03,0.438000
2025-02-03,0.345000
2025-05-01,0.345000
2016-11-01,0.027000
2016-12-28,0.034000
2019-03-01,0.179000
2019-05-01,0.195000
2022-07-01,0.066000
2025-04-01,0.343000
2026-04-01,0.302000
2026-06-01,0.278000
2017-04-03,0.042000
2018-12-27,0.184000