f/overrides/event-backup/jemvx-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
2013-07-31,0.035000
2015-12-29,0.047000
2016-01-27,0.027000
2017-04-26,0.035000
2020-11-25,0.025000
2022-05-26,0.027000
2023-08-29,0.037000
2015-09-28,0.036000
2021-11-26,0.029000
2017-09-27,0.036000
2019-10-29,0.034000
2021-05-26,0.028000
2015-01-29,0.013000
2015-04-28,0.097000
2016-07-27,0.021000
2019-02-26,0.032000
2023-05-26,0.031000
2024-07-29,0.034000
2026-04-28,0.052000
2014-02-28,0.031000
2015-10-28,0.014000
2016-12-28,0.090000
2018-11-28,0.036000
2016-04-27,0.046000
2018-01-31,0.018000
2018-04-26,0.051000
2019-03-27,0.034000
2019-05-29,0.028000
2021-07-28,0.029000
2025-05-28,0.035000
2012-12-31,0.092000
2016-03-29,0.033000
2020-08-27,0.013000
2024-08-28,0.030000
2026-03-27,0.035000
2025-06-26,0.036000
2014-12-30,0.106000
2017-05-26,0.036000
2017-06-28,0.038000
2017-08-29,0.036000
2018-10-29,0.043000
2019-01-29,0.026000
2019-11-26,0.033000
2013-11-29,0.039000
2015-07-29,0.035000
2021-02-24,0.025000
2021-12-29,0.032000
2025-01-29,0.042000
2025-10-29,0.037000
2013-08-30,0.028000
2013-09-30,0.033000
2022-06-28,0.031000
2025-03-27,0.037000
2016-09-28,0.025000
2021-01-27,0.024000
2023-07-27,0.030000
2024-10-29,0.033000
2026-02-25,0.032000
2014-03-31,0.032000
2014-06-30,0.013000
2017-01-27,0.021000
2019-08-28,0.032000
2022-07-27,0.033000
2014-10-31,0.066000
2016-10-27,0.027000
2018-03-27,0.028000
2018-07-27,0.037000
2018-09-26,0.033000
2024-02-27,0.029000
2026-07-29,0.039000
2013-12-31,0.064000
2019-07-29,0.038000
2020-01-29,0.031000
2020-03-27,0.035000
2020-04-28,0.033000
2024-01-29,0.033000
2026-06-26,0.037000
2013-02-28,0.029000
2016-02-25,0.028000
2020-02-26,0.037000
2020-06-26,0.007000
2020-07-29,0.030000
2017-10-27,0.032000
2019-06-26,0.028000
2019-12-27,0.039000
2023-04-26,0.016000
2012-11-30,0.036000
2013-06-28,0.035000
2025-11-25,0.037000
2021-03-29,0.027000
2022-01-27,0.027000
2022-10-27,0.037000
2024-03-26,0.031000
2024-05-29,0.034000
2024-06-26,0.033000
2013-10-31,0.042000
2021-04-28,0.035000
2022-04-27,0.035000
2022-08-29,0.029000
2023-02-24,0.031000
2023-09-27,0.029000
2023-12-27,0.032000
2013-03-28,0.036000
2014-07-31,0.050000
2014-08-29,0.016000
2017-03-29,0.026000
2015-08-27,0.052000
2022-03-29,0.026000
2022-12-28,0.051000
2025-09-26,0.015000
2026-01-28,0.037000
2019-09-26,0.036000
2021-10-27,0.029000
2022-02-24,0.025000
2023-10-27,0.028000
2012-08-31,0.035000
2012-10-31,0.035000
2018-05-29,0.025000
2020-12-29,0.024000
2025-04-28,0.023000
2015-06-26,0.024000
2023-06-28,0.029000
2024-11-26,0.034000
2024-12-27,0.039000
2025-07-29,0.039000
2013-05-31,0.033000
2017-07-27,0.023000
2018-12-27,0.023000
2022-11-28,0.027000
2023-01-27,0.026000
2023-11-28,0.026000
2022-09-28,0.024000
2014-05-30,0.009000
2016-08-29,0.025000
2016-11-28,0.043000
2020-05-27,0.031000
2021-06-28,0.029000
2021-08-27,0.033000
2021-09-28,0.029000
2025-12-29,0.042000
2026-05-27,0.033000
2015-05-27,0.024000
2015-11-25,0.041000
2017-12-27,0.044000
2018-02-26,0.035000
2019-04-26,0.031000
2023-03-29,0.030000
2024-09-26,0.027000
2016-05-26,0.033000
2024-04-26,0.032000
2025-08-27,0.039000
2020-10-28,0.031000
2013-04-30,0.070000
2014-04-30,0.023000
2016-06-28,0.025000
2017-02-24,0.036000
2017-11-28,0.029000
2018-08-29,0.039000
2020-09-28,0.028000
2012-09-28,0.038000
2018-06-27,0.002000
2025-02-26,0.037000