f/overrides/event-backup/divo-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
2020-03-27,0.109000
2023-05-26,0.139000
2025-01-30,0.169000
2025-05-29,0.165000
2024-07-30,0.158000
2018-08-30,0.124000
2019-09-27,0.140000
2020-08-27,0.141000
2022-05-26,0.141000
2023-06-28,0.142000
2024-05-30,0.154000
2025-11-26,0.214000
2026-03-30,0.179000
2017-12-28,0.344000
2019-12-30,1.004000
2021-05-26,0.157000
2021-08-27,0.153000
2022-09-28,0.130000
2023-12-27,0.146000
2020-11-25,0.147000
2021-03-29,0.157000
2022-08-29,0.144000
2023-08-29,0.143000
2024-03-26,0.155000
2025-04-29,0.158000
2026-06-29,0.183000
2019-08-29,0.137000
2023-02-24,0.141000
2025-03-28,0.165000
2025-08-28,0.175000
2025-12-30,0.953000
2026-05-28,0.184000
2024-01-29,0.149000
2024-02-27,0.152000
2019-03-28,0.133000
2019-07-30,0.141000
2020-10-28,0.140000
2021-06-28,0.148000
2021-10-27,0.148000
2023-09-27,0.141000
2024-04-26,0.153000
2026-01-29,0.183000
2026-07-30,0.188000
2017-06-28,0.311000
2019-04-29,0.136000
2019-11-27,0.143000
2020-04-28,0.125000
2021-04-28,0.154000
2023-11-28,0.142000
2024-11-27,0.171000
2025-02-27,0.167000
2019-02-27,0.133000
2019-05-30,0.133000
2020-07-29,0.134000
2022-02-24,0.145000
2023-01-27,0.144000
2023-04-26,0.145000
2025-10-30,0.182000
2018-12-28,0.116000
2021-12-29,0.153000
2022-01-27,0.145000
2022-07-27,0.138000
2019-06-27,0.139000
2022-06-28,0.137000
2024-08-29,0.161000
2019-10-30,0.140000
2022-04-27,0.147000
2023-03-29,0.139000
2025-07-30,0.172000
2026-02-26,0.186000
2017-09-28,0.316000
2018-06-28,0.335000
2020-06-26,0.129000
2023-07-27,0.148000
2024-06-27,0.156000
2017-03-29,0.139000
2018-09-27,0.125000
2019-01-30,0.127000
2021-01-27,0.153000
2021-07-28,0.153000
2022-11-28,0.147000
2025-06-27,0.168000
2018-10-30,0.129000
2020-09-28,0.132000
2021-09-28,0.149000
2022-12-28,0.144000
2024-09-27,0.163000
2026-04-29,0.181000
2018-07-30,0.115000
2018-11-29,0.131000
2020-01-29,0.139000
2020-05-27,0.126000
2021-11-26,0.150000
2022-10-27,0.139000
2024-10-30,0.164000
2024-12-30,0.165000
2018-03-28,0.332000
2020-02-26,0.137000
2020-12-29,0.149000
2021-02-24,0.153000
2022-03-29,0.151000
2023-10-27,0.138000
2025-09-29,0.177000