f/overrides/event-backup/fhahx-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
2019-02-08,0.012000
2019-07-05,0.013000
2020-06-05,0.009000
2021-10-01,0.098000
2022-02-04,0.001000
2022-05-06,0.135000
2022-07-01,0.008000
2023-02-03,0.009000
2023-03-03,0.009000
2024-10-04,0.019000
2025-05-02,0.025000
2025-08-01,0.033000
2025-10-03,0.017000
2026-04-01,0.011000
2019-12-30,0.133000
2020-03-06,0.010000
2022-03-04,0.002000
2024-06-07,0.014000
2025-02-07,0.010000
2026-06-05,0.016000
2019-08-02,0.011000
2022-10-07,0.082000
2023-04-05,0.016000
2024-03-01,0.016000
2020-07-10,0.007000
2021-06-04,0.002000
2021-04-05,0.004000
2021-07-02,0.003000
2024-11-01,0.027000
2020-02-07,0.007000
2020-10-02,0.008000
2021-03-05,0.003000
2021-11-05,0.003000
2022-11-04,0.010000
2019-06-07,0.016000
2020-11-06,0.005000
2023-07-07,0.017000
2023-08-04,0.017000
2023-09-08,0.015000
2024-02-02,0.009000
2025-04-04,0.016000
2019-10-04,0.012000
2020-08-07,0.009000
2020-12-30,0.183000
2023-06-02,0.013000
2025-03-07,0.012000
2026-02-06,0.009000
2026-05-01,0.016000
2024-08-02,0.034000
2019-04-05,0.003000
2021-12-30,0.194000
2023-10-06,0.020000
2026-03-06,0.013000
2018-10-05,0.025000
2018-12-28,0.112000
2019-11-08,0.011000
2023-12-28,0.141000
2024-05-03,0.022000
2026-07-10,0.012000
2026-08-07,0.045000
2018-11-02,0.009000
2019-09-06,0.015000
2024-09-06,0.020000
2020-04-03,0.009000
2022-04-01,0.005000
2024-04-05,0.016000
2025-09-05,0.020000
2019-05-03,0.012000
2021-02-05,0.003000
2022-08-05,0.009000
2024-12-30,0.116000
2019-03-08,0.015000
2020-09-04,0.007000
2021-08-06,0.004000
2022-06-03,0.006000
2022-09-02,0.011000
2023-05-05,0.015000
2024-07-05,0.011000
2025-06-06,0.020000
2025-07-11,0.014000
2025-11-07,0.038000
2025-12-30,0.144000
2020-05-01,0.008000
2020-05-08,0.033000
2021-05-07,0.124000
2021-09-03,0.005000
2022-12-29,0.163000
2023-11-03,0.014000