f/overrides/event-backup/cltl-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
2022-12-19,0.393830
2025-04-21,0.354210
2025-11-24,0.333530
2020-06-22,0.050300
2020-12-21,0.049560
2020-03-23,0.136590
2024-12-23,0.374470
2026-06-22,0.315800
2018-08-20,0.987010
2019-06-24,0.206690
2025-07-21,0.378190
2026-03-23,0.296030
2022-06-21,0.033470
2024-08-19,0.474820
2023-12-18,0.493350
2022-10-24,0.231120
2023-04-24,0.374290
2021-03-22,0.001680
2024-10-21,0.432920
2017-12-18,0.746840
2019-01-22,0.204310
2023-10-23,0.450240
2024-03-18,0.439030
2019-02-19,0.193540
2019-07-22,0.210460
2023-08-21,0.442270
2024-01-22,0.454630
2018-11-19,0.168810
2020-08-24,0.011600
2019-05-20,0.220460
2023-02-21,0.316500
2023-11-20,0.469680
2024-09-23,0.443040
2025-12-22,0.347390
2018-10-22,0.156040
2018-12-24,0.281930
2023-03-20,0.371840
2023-07-24,0.433780
2023-09-18,0.430910
2026-04-20,0.269260
2020-10-19,0.025490
2022-09-19,0.218120
2023-05-22,0.396520
2024-04-22,0.434300
2021-01-19,0.007660
2021-02-22,0.006380
2021-07-19,0.000640
2022-04-18,0.014080
2022-07-18,0.143080
2022-11-21,0.261200
2023-06-20,0.385830
2024-02-20,0.462770
2020-05-18,0.079040
2020-07-20,0.039100
2025-09-22,0.352900
2024-06-24,0.441300
2025-02-24,0.374750
2021-12-20,0.037910
2024-11-18,0.415360
2019-03-18,0.211380
2020-01-21,0.159710
2020-04-20,0.112290
2021-04-19,0.000750
2021-05-24,0.000640
2022-02-22,0.000850
2024-07-22,0.457470
2025-03-24,0.363660
2019-04-22,0.205550
2019-12-23,0.181130
2022-03-21,0.005510
2023-01-23,0.324780
2025-05-19,0.329280
2019-09-23,0.186420
2019-10-21,0.187720
2024-05-20,0.437600
2018-09-24,0.187550
2022-08-22,0.121790
2020-02-24,0.143590
2020-09-21,0.025950
2020-11-23,0.012160
2022-05-23,0.023920
2025-01-21,0.394990
2025-06-23,0.371590
2019-08-19,0.186300
2019-11-18,0.173380
2026-01-20,0.330150
2026-02-23,0.323100
2026-05-18,0.315830
2026-07-20,0.307400
2025-08-18,0.353810
2025-10-20,0.353000