f/overrides/event-backup/fllv-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
2020-06-11,0.082252
2022-12-12,0.268943
2025-02-28,0.243492
2025-03-31,0.274568
2017-06-20,0.064860
2017-09-20,0.171163
2023-06-16,0.144570
2023-12-15,0.398426
2025-08-29,0.264970
2019-03-20,0.102035
2021-12-13,0.252265
2026-06-30,0.250000
2022-03-10,0.116451
2024-03-15,0.157383
2024-07-31,0.167174
2025-06-30,0.237793
2026-01-30,0.290000
2022-09-08,0.211194
2023-09-15,0.239348
2025-09-30,0.288630
2017-12-20,0.149510
2024-10-31,0.216108
2025-01-31,0.196694
2025-11-28,0.230000
2019-09-11,0.167717
2020-12-14,0.218270
2021-03-11,0.128884
2022-06-17,0.181148
2024-06-28,0.340880
2024-12-31,0.251068
2025-05-30,0.271993
2026-02-27,0.300000
2021-06-10,0.150212
2025-04-30,0.229194
2018-03-20,0.067311
2018-06-20,0.056918
2020-03-11,0.085920
2021-09-13,0.193462
2026-04-30,0.340000
2018-09-20,0.163656
2020-09-14,0.206406
2024-11-29,0.225750
2025-12-30,0.215000
2023-03-17,0.122775
2024-08-30,0.247248
2025-07-31,0.212060
2026-03-31,0.350000
2026-07-31,0.300000
2017-03-20,0.049183
2025-10-31,0.215000
2026-05-29,0.250000
2016-12-20,0.128915
2018-12-20,0.500405
2019-06-11,0.049684
2019-12-11,0.179780
2024-09-30,0.197160