f/overrides/event-backup/lmecx-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
2021-07-16,0.033000
2021-12-15,0.215000
2024-06-14,0.033000
2026-06-16,0.010000
2023-11-15,0.019000
2024-04-16,0.037000
2025-07-15,0.029000
2026-02-13,0.032000
2018-12-18,0.070000
2019-12-17,0.382000
2021-03-16,0.016000
2023-04-14,0.033000
2026-04-15,0.009000
2018-11-16,0.002000
2019-03-15,0.037000
2020-03-17,0.039000
2024-12-17,0.065000
2023-12-15,0.059000
2024-02-15,0.035000
2024-08-15,0.032000
2025-08-15,0.032000
2019-01-15,0.005000
2021-09-15,0.028000
2022-01-14,0.012000
2022-06-15,0.009000
2025-12-16,0.028000
2019-08-15,0.038000
2023-03-15,0.033000
2023-05-16,0.037000
2024-11-15,0.037000
2024-09-17,0.038000
2025-11-14,0.021000
2018-06-15,0.033000
2020-12-15,0.004000
2021-04-15,0.033000
2021-08-17,0.036000
2018-07-16,0.033000
2019-06-14,0.037000
2022-09-15,0.010000
2018-09-17,0.035000
2021-11-16,0.032000
2022-08-16,0.007000
2023-01-13,0.016000
2025-09-16,0.033000
2019-05-15,0.035000
2021-06-15,0.105000
2021-10-15,0.029000
2023-08-15,0.044000
2025-10-15,0.020000
2019-09-13,0.036000
2020-01-15,0.020000
2023-07-14,0.037000
2025-02-14,0.030000
2022-04-14,0.010000
2022-05-17,0.011000
2024-01-17,0.018000
2024-07-16,0.035000
2019-02-15,0.040000
2020-02-14,0.037000
2025-05-15,0.029000
2023-06-15,0.034000
2024-03-15,0.034000
2025-04-15,0.033000
2026-05-15,0.018000
2025-01-15,0.012000
2026-03-13,0.032000
2018-08-16,0.033000
2020-05-15,0.013000
2021-05-14,0.032000
2024-10-15,0.001000
2019-07-16,0.040000
2023-09-15,0.046000
2025-03-14,0.006000
2026-07-15,0.010000
2020-04-15,0.024000
2023-02-15,0.028000
2025-06-17,0.034000
2026-01-15,0.004000
2018-10-16,0.030000
2019-04-16,0.040000
2019-10-16,0.040000
2019-11-15,0.036000