f/overrides/event-backup/near-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
2019-11-01,0.111000
2021-10-01,0.030000
2019-03-01,0.120000
2019-08-01,0.115000
2024-06-03,0.204000
2013-12-02,0.035000
2017-12-21,0.057000
2015-05-01,0.034000
2017-07-03,0.067000
2020-12-17,0.042000
2021-09-01,0.028000
2026-07-01,0.177000
2014-08-01,0.038000
2015-04-01,0.034000
2024-11-01,0.192000
2025-03-03,0.180000
2025-06-02,0.201000
2015-06-01,0.035000
2021-07-01,0.032000
2026-02-02,0.178000
2017-11-01,0.067000
2023-02-01,0.131000
2018-04-02,0.082000
2023-10-02,0.198000
2025-12-19,0.276000
2014-12-24,0.032000
2016-09-01,0.054000
2017-04-03,0.059000
2017-09-01,0.070000
2017-12-01,0.070000
2019-04-01,0.118000
2019-09-03,0.112000
2020-09-01,0.047000
2015-03-02,0.039000
2015-09-01,0.037000
2017-08-01,0.068000
2021-12-01,0.027000
2022-12-01,0.125000
2025-09-02,0.182000
2014-04-01,0.037000
2014-05-01,0.037000
2018-02-01,0.075000
2023-12-01,0.235000
2025-05-01,0.193000
2016-10-03,0.049000
2017-06-01,0.063000
2016-11-01,0.047000
2016-12-22,0.039000
2020-05-01,0.081000
2022-03-01,0.027000
2014-07-01,0.038000
2015-12-01,0.038000
2018-03-01,0.075000
2018-09-04,0.106000
2019-12-02,0.100000
2020-04-01,0.093000
2023-08-01,0.182000
2024-02-01,0.211000
2014-03-03,0.040000
2015-07-01,0.033000
2022-09-01,0.083000
2026-03-02,0.170000
2023-11-01,0.208000
2024-04-01,0.199000
2025-07-01,0.185000
2014-11-03,0.034000
2023-09-01,0.194000
2015-10-01,0.037000
2017-02-01,0.053000
2019-05-01,0.119000
2020-06-01,0.070000
2020-10-01,0.041000
2021-04-01,0.036000
2013-12-26,0.005000
2014-10-01,0.030000
2024-03-01,0.195000
2021-12-16,0.020000
2023-12-14,0.318000
2024-05-01,0.200000
2025-08-01,0.182000
2016-12-01,0.049000
2020-12-01,0.044000
2022-11-01,0.132000
2024-12-02,0.181000
2024-12-18,0.289000
2016-02-01,0.042000
2021-03-01,0.040000
2019-06-03,0.120000
2025-12-01,0.176000
2016-06-01,0.043000
2018-08-01,0.100000
2021-08-02,0.031000
2023-05-01,0.184000
2018-07-02,0.100000
2018-12-03,0.101000
2017-10-02,0.068000
2018-06-01,0.093000
2018-05-01,0.087000
2023-04-03,0.161000
2020-07-01,0.061000
2022-06-01,0.042000
2026-04-01,0.182000
2018-10-01,0.101000
2019-07-01,0.115000
2021-11-01,0.029000
2026-06-01,0.178000
2014-12-01,0.035000
2018-11-01,0.110000
2024-07-01,0.213000
2016-08-01,0.049000
2021-05-03,0.032000
2015-11-02,0.039000
2016-05-02,0.040000
2019-12-19,0.103000
2020-08-03,0.052000
2021-02-01,0.043000
2024-10-01,0.207000
2014-06-02,0.035000
2015-08-03,0.036000
2025-10-01,0.176000
2026-08-03,0.184000
2017-03-01,0.059000
2018-12-18,0.091000
2019-02-01,0.111000
2019-10-01,0.106000
2020-11-02,0.040000
2022-10-03,0.091000
2015-02-02,0.033000
2016-07-01,0.047000
2023-07-03,0.184000
2025-11-03,0.177000
2024-09-03,0.210000
2022-12-15,0.157000
2024-08-01,0.226000
2022-08-01,0.067000
2025-02-03,0.195000
2017-05-01,0.061000
2022-05-02,0.036000
2023-03-01,0.146000
2020-02-03,0.102000
2022-07-01,0.058000
2022-04-01,0.031000
2023-06-01,0.175000
2026-05-01,0.182000
2014-09-02,0.036000
2020-03-02,0.096000
2021-06-01,0.032000
2022-02-01,0.028000
2025-04-01,0.196000
2014-02-03,0.035000
2015-12-24,0.029000