f/overrides/event-backup/fbnd-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
2017-11-28,0.120000
2020-02-26,0.108000
2014-11-26,0.120000
2015-04-28,0.132000
2015-05-27,0.114000
2022-02-24,0.080000
2022-06-28,0.113000
2022-08-29,0.127000
2026-07-30,0.179000
2020-08-27,0.116000
2020-09-28,0.111000
2021-12-29,0.076000
2024-07-30,0.185000
2024-08-29,0.177000
2024-09-27,0.169000
2018-08-29,0.120000
2019-03-27,0.128000
2020-10-28,0.097000
2020-03-27,0.130000
2020-12-04,1.034000
2026-01-29,0.146000
2014-12-29,0.129000
2016-06-28,0.128000
2016-12-28,0.111000
2014-10-28,0.079000
2024-06-27,0.181000
2020-11-25,0.087000
2023-02-24,0.155000
2023-08-29,0.169000
2018-05-29,0.119000
2019-06-26,0.131000
2025-01-30,0.147000
2020-01-29,0.106000
2016-07-27,0.116000
2017-10-27,0.105000
2019-09-26,0.123000
2019-12-27,0.124000
2020-06-26,0.091000
2022-03-29,0.097000
2025-03-28,0.183000
2025-11-26,0.170000
2016-01-27,0.099000
2017-05-26,0.102000
2018-03-27,0.120000
2026-05-28,0.173000
2015-11-25,0.128000
2016-10-27,0.097000
2021-11-26,0.076000
2017-01-27,0.103000
2018-12-27,0.130000
2025-07-30,0.175000
2015-10-28,0.122000
2016-02-25,0.123000
2023-05-26,0.151000
2024-01-29,0.175000
2024-04-26,0.181000
2015-02-25,0.109000
2015-08-27,0.134000
2017-12-27,0.096000
2024-03-26,0.170000
2016-11-28,0.115000
2019-11-26,0.123000
2021-03-29,0.085000
2021-06-28,0.086000
2024-11-27,0.154000
2025-10-30,0.167000
2026-04-29,0.172000
2016-08-29,0.141000
2018-11-28,0.119000
2019-02-26,0.127000
2026-02-26,0.161000
2026-06-29,0.169000
2017-06-28,0.107000
2018-01-29,0.102000
2024-02-27,0.172000
2024-12-30,0.238000
2017-03-29,0.117000
2018-06-27,0.121000
2024-10-30,0.142000
2022-04-27,0.098000
2022-12-28,0.152000
2025-12-30,0.267000
2025-08-28,0.184000
2025-09-29,0.168000
2015-07-29,0.147000
2018-07-27,0.130000
2021-10-27,0.077000
2017-02-24,0.110000
2022-10-27,0.147000
2020-12-29,0.084000
2021-05-26,0.086000
2022-09-28,0.129000
2023-11-28,0.170000
2015-03-27,0.120000
2018-02-26,0.100000
2020-07-29,0.104000
2025-05-29,0.175000
2015-01-28,0.122000
2022-07-27,0.118000
2022-11-28,0.139000
2015-12-29,0.156000
2023-07-27,0.166000
2020-05-27,0.103000
2021-07-28,0.084000
2025-04-29,0.189000
2015-06-26,0.142000
2018-10-29,0.120000
2019-05-29,0.133000
2019-04-26,0.132000
2023-10-27,0.177000
2023-12-27,0.185000
2023-09-27,0.149000
2016-05-26,0.127000
2018-04-26,0.126000
2018-09-26,0.113000
2023-06-28,0.183000
2026-03-30,0.178000
2017-07-27,0.109000
2021-02-24,0.085000
2023-01-27,0.143000
2022-01-27,0.076000
2023-03-29,0.158000
2019-01-29,0.115000
2019-10-29,0.115000
2021-08-27,0.085000
2017-08-29,0.107000
2021-09-28,0.078000
2025-06-27,0.176000
2020-04-28,0.132000
2025-02-27,0.163000
2021-01-27,0.081000
2022-05-26,0.107000
2023-04-26,0.155000
2015-09-28,0.141000
2016-09-28,0.101000
2019-08-28,0.123000
2024-05-30,0.179000
2017-09-27,0.095000
2019-07-29,0.128000
2021-04-28,0.089000