f/overrides/event-backup/fttax-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
2009-03-31,0.003000
2016-06-28,0.168000
2007-03-15,0.003000
2008-12-29,0.081000
2013-12-30,0.373000
2015-06-26,0.242000
2008-03-17,0.003000
2011-12-28,0.123000
2023-03-31,0.054000
2016-03-29,0.004000
2020-09-28,0.038000
2009-12-29,0.096000
2014-03-27,0.004000
2020-06-26,0.379000
2023-06-30,0.063000
2021-03-29,0.005000
2021-12-30,2.904000
2022-12-29,0.023000
2006-12-28,0.134000
2011-03-29,0.013000
2013-06-26,0.157000
2018-03-27,0.009000
2018-12-28,0.463000
2024-12-30,0.303000
2012-03-28,0.010000
2014-12-30,0.598000
2016-12-29,0.093000
2017-12-28,0.204000
2018-06-27,0.199000
2024-06-17,0.001000
2024-06-28,0.049000
2024-09-30,0.047000
2026-06-15,0.578000
2007-12-28,0.159000
2015-03-27,0.008000
2019-12-30,0.189000
2020-12-30,0.201000
2023-12-28,0.075000
2024-03-28,0.058000
2019-06-26,0.202000
2025-12-30,0.528000
2010-12-29,0.139000
2013-03-26,0.001000
2017-03-29,0.086000
2020-03-27,0.007000
2021-09-28,0.036000
2025-06-16,0.619000
2014-06-26,0.214000
2015-12-30,0.445000
2018-09-26,0.078000
2019-09-26,0.028000
2023-06-15,0.068000
2023-09-29,0.057000
2022-06-15,0.413000
2022-06-30,0.030000
2010-03-29,0.004000
2012-12-28,0.140000
2019-03-27,0.007000
2021-06-28,0.344000
2022-09-30,0.029000