f/overrides/event-backup/dhdg-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,ctime
2017-03-27,0.105,2022-03-10 08:33:27
2017-03-27,0.105000,2021-12-20 13:20:52
2017-03-27,0.105,2017-08-22
2017-09-26,0.065,2022-03-10 08:33:27
2017-09-26,0.065000,2021-12-20 13:20:52
2017-09-26,0.065,2017-10-20 09:54:16
2017-12-05,0.165000,2021-12-20 13:20:52
2017-12-05,0.165,2017-12-11 20:07:47
2017-12-26,0.012000,2021-12-20 13:20:52
2017-12-26,0.012,2018-01-16 07:54:11
2017-12-05,0.165,2018-01-16 07:54:11
2018-06-25,0.130000,2021-12-20 13:20:52
2018-09-25,0.01,2022-03-10 08:33:27
2018-09-25,0.010000,2021-12-20 13:20:52
2018-09-25,0.01,2018-12-20 11:23:51
2018-06-25,0.13,2018-12-20 11:23:51
2017-12-26,0.012,2018-12-20 11:23:51
2017-12-05,0.165,2018-12-20 11:23:51
2018-12-04,0.930000,2021-12-20 13:20:52
2018-12-04,0.93,2018-12-20 11:23:51
2019-03-26,0.07,2022-03-10 08:33:27
2019-03-26,0.070000,2021-12-20 13:20:52
2019-03-26,0.07,2019-04-02 14:23:09
2018-06-25,0.13,2019-04-02 14:23:09
2017-12-26,0.012,2019-04-02 14:23:09
2017-12-05,0.165,2019-04-02 14:23:09
2018-12-04,0.93,2019-04-02 14:23:09
2019-06-24,0.215000,2021-12-20 13:20:52
2019-06-24,0.215,2019-06-26 14:15:25
2017-12-26,0.012,2019-06-26 14:15:25
2017-12-05,0.165,2019-06-26 14:15:25
2018-12-04,0.93,2019-06-26 14:15:25
2019-12-09,0.169,2022-03-10 08:33:27
2018-06-25,0.13,2022-03-10 12:28:16
2019-06-24,0.215,2022-03-10 12:28:16
2019-12-09,0.169000,2021-12-20 13:20:52
2018-06-25,0.13,2022-03-10 08:33:27
2019-06-24,0.215,2022-03-10 08:33:27
2019-12-09,0.169,2019-12-19 07:25:20
2018-06-25,0.13,2019-12-19 07:25:20
2019-06-24,0.215,2019-12-19 07:25:20
2017-12-26,0.012,2019-12-19 07:25:20
2017-12-05,0.165,2019-12-19 07:25:20
2018-12-04,0.93,2019-12-19 07:25:20
2019-12-23,0.157,2022-03-10 08:33:27
2017-12-26,0.012,2022-03-10 12:28:16
2017-12-05,0.165,2022-03-10 12:28:16
2018-12-04,0.93,2022-03-10 12:28:16
2019-12-23,0.157000,2021-12-20 13:20:52
2017-12-26,0.012,2022-03-10 08:33:27
2017-12-05,0.165,2022-03-10 08:33:27
2018-12-04,0.93,2022-03-10 08:33:27
2019-12-23,0.157,2019-12-31 10:58:18
2017-12-26,0.012,2019-12-31 10:58:18
2017-12-05,0.165,2019-12-31 10:58:18
2018-12-04,0.93,2019-12-31 10:58:18