f/overrides/event-backup/igeb-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
2018-10-01,0.143000
2021-06-01,0.117000
2026-06-01,0.191000
2020-10-01,0.121000
2022-02-01,0.110000
2024-04-01,0.188000
2024-12-18,0.200000
2018-03-01,0.142000
2024-12-02,0.226000
2019-05-01,0.151000
2022-03-01,0.116000
2024-03-01,0.185000
2025-05-01,0.191000
2025-12-19,0.205000
2021-08-02,0.116000
2023-09-01,0.183000
2024-09-03,0.187000
2024-11-01,0.186000
2017-11-01,0.139000
2025-08-01,0.188000
2022-10-03,0.141000
2023-04-03,0.172000
2020-04-01,0.153000
2023-10-02,0.176000
2026-03-02,0.185000
2019-06-03,0.166000
2021-11-01,0.114000
2021-07-01,0.117000
2019-08-01,0.159000
2020-03-02,0.151000
2021-03-01,0.127000
2018-09-04,0.131000
2020-05-01,0.146000
2018-02-01,0.131000
2018-06-01,0.146000
2024-08-01,0.189000
2024-10-01,0.189000
2023-06-01,0.177000
2018-05-01,0.142000
2021-12-16,0.108000
2023-05-01,0.172000
2025-02-03,0.183000
2017-12-01,0.139000
2021-04-01,0.121000
2021-09-01,0.113000
2019-03-01,0.148000
2021-02-01,0.124000
2023-12-14,0.182000
2019-04-01,0.154000
2020-02-03,0.145000
2022-12-15,0.174000
2022-07-01,0.126000
2022-11-01,0.146000
2024-07-01,0.169000
2026-04-01,0.204000
2025-06-02,0.185000
2025-11-03,0.188000
2022-04-01,0.119000
2025-10-01,0.188000
2020-06-01,0.140000
2021-12-01,0.730000
2018-11-01,0.154000
2019-07-01,0.161000
2019-12-19,0.140000
2023-12-01,0.172000
2020-11-02,0.123000
2020-12-01,0.607000
2023-02-01,0.133000
2024-05-01,0.181000
2018-12-18,0.140000
2019-09-03,0.160000
2019-11-01,0.155000
2021-05-03,0.121000
2022-09-01,0.138000
2023-03-01,0.163000
2019-10-01,0.151000
2020-08-03,0.128000
2020-12-17,0.122000
2017-09-01,0.213000
2025-09-02,0.189000
2022-06-01,0.120000
2025-04-01,0.185000
2020-07-01,0.131000
2022-12-01,0.145000
2023-11-01,0.188000
2017-12-21,0.184000
2018-07-02,0.142000
2024-02-01,0.172000
2025-12-01,0.189000
2026-05-01,0.191000
2023-07-03,0.180000
2026-07-01,0.178000
2018-04-02,0.140000
2019-02-01,0.150000
2021-10-01,0.115000
2022-05-02,0.118000
2024-06-03,0.187000
2025-07-01,0.173000
2022-08-01,0.121000
2018-08-01,0.135000
2019-12-02,1.207000
2023-08-01,0.184000
2026-02-02,0.182000
2026-08-03,0.193000
2020-09-01,0.121000
2025-03-03,0.184000
2018-12-03,0.156000