f/overrides/event-backup/dpiax-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
2017-11-29,0.075000
2020-02-27,0.061000
2024-09-27,0.096000
2019-08-29,0.063000
2026-04-29,0.090000
2014-11-26,0.055000
2015-11-27,0.076000
2017-07-28,0.062000
2019-02-27,0.036000
2014-07-30,0.039000
2017-08-30,0.028000
2016-10-28,0.053000
2023-12-27,0.155000
2014-03-28,0.101000
2015-07-30,0.032000
2015-09-29,0.128000
2016-03-30,0.099000
2017-05-30,0.078000
2026-03-30,0.120000
2020-04-29,0.054000
2020-09-29,0.076000
2025-08-28,0.047000
2015-06-29,0.095000
2017-06-29,0.064000
2017-09-29,0.072000
2018-06-28,0.073000
2016-08-30,0.054000
2021-01-28,0.018000
2021-06-29,0.081000
2023-05-30,0.071000
2016-07-28,0.034000
2018-10-30,0.047000
2020-01-30,0.048000
2022-05-27,0.068000
2016-12-29,0.125000
2018-07-30,0.095000
2019-05-30,0.071000
2019-11-27,0.074000
2025-03-28,0.084000
2023-08-30,0.076000
2026-01-29,0.067000
2016-11-29,0.074000
2019-10-30,0.046000
2021-09-29,0.059000
2023-01-30,0.037000
2012-03-28,0.145000
2013-09-27,0.025000
2014-04-29,0.038000
2014-06-27,0.079000
2023-03-30,0.071000
2018-04-27,0.083000
2019-07-30,0.066000
2021-07-29,0.043000
2021-11-29,0.065000
2025-12-29,0.122000
2026-07-30,0.056000
2014-12-30,0.116000
2015-12-30,0.069000
2016-02-26,0.033000
2019-04-29,0.086000
2021-08-30,0.059000
2023-07-28,0.048000
2025-06-27,0.103000
2015-01-29,0.025000
2015-02-26,0.040000
2015-03-30,0.105000
2019-06-27,0.071000
2022-10-28,0.055000
2024-06-27,0.082000
2024-12-27,0.098000
2023-02-27,0.073000
2023-04-27,0.046000
2023-11-29,0.078000
2018-01-30,0.033000
2020-07-30,0.055000
2021-05-27,0.060000
2022-03-30,0.073000
2015-05-28,0.103000
2022-02-25,0.058000
2023-10-30,0.052000
2025-09-29,0.142000
2021-03-30,0.076000
2023-09-28,0.089000
2024-07-30,0.050000
2012-12-27,0.238000
2016-04-28,0.036000
2018-08-30,0.031000
2020-05-28,0.068000
2020-11-27,0.066000
2025-01-30,0.048000
2014-08-28,0.090000
2014-10-30,0.043000
2015-04-29,0.011000
2018-02-27,0.022000
2013-10-30,0.078000
2016-01-28,0.028000
2017-01-30,0.049000
2021-04-29,0.047000
2014-09-29,0.065000
2022-01-28,0.035000
2024-11-27,0.058000
2025-02-27,0.062000
2014-01-30,0.040000
2016-09-29,0.080000
2017-10-30,0.057000
2019-03-27,0.055000
2023-06-29,0.078000
2015-08-28,0.021000
2017-02-28,0.047000
2020-12-29,0.125000
2022-06-29,0.083000
2015-10-29,0.026000
2018-05-30,0.075000
2021-02-25,0.048000
2026-06-29,0.120000
2020-08-28,0.063000
2024-01-30,0.013000
2024-03-27,0.078000
2025-10-30,0.043000
2013-04-02,0.082000
2014-02-27,0.033000
2014-05-29,0.084000
2016-05-27,0.080000
2020-10-29,0.037000
2022-08-30,0.063000
2022-12-28,0.094000
2025-05-29,0.038000
2012-10-02,0.149000
2013-11-27,0.086000
2017-12-29,0.216000
2018-03-28,0.067000
2018-11-29,0.077000
2021-10-28,0.042000
2022-07-28,0.051000
2025-07-30,0.066000
2011-09-27,0.203000
2011-12-20,0.209000
2013-12-27,0.105000
2017-03-30,0.063000
2025-11-26,0.055000
2019-01-30,0.038000
2022-04-28,0.046000
2022-09-29,0.078000
2024-10-30,0.049000
2024-08-29,0.062000
2026-02-26,0.024000
2016-06-29,0.068000
2019-09-27,0.063000
2019-12-27,0.179000
2022-11-29,0.070000
2020-06-29,0.078000
2024-02-28,0.023000
2024-04-29,0.049000
2025-04-29,0.062000
2012-07-02,0.165000
2018-09-27,0.077000
2018-12-28,0.306000
2020-03-30,0.078000
2026-05-28,0.030000
2013-06-27,0.301000
2017-04-28,0.051000
2021-12-29,0.086000
2024-05-30,0.069000