f/overrides/event-backup/gyld-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
2019-09-16,0.036000
2025-12-26,0.098000
2015-12-29,0.139000
2017-06-16,0.278000
2019-07-16,0.114000
2016-12-28,0.123000
2026-02-17,0.084000
2026-07-16,0.084000
2014-08-18,0.217000
2016-07-18,0.067000
2016-09-16,0.110000
2013-07-16,0.039000
2022-03-16,0.023000
2026-04-16,0.056000
2022-06-16,0.067000
2025-10-16,0.056000
2019-05-16,0.088000
2019-10-16,0.096000
2021-12-23,0.046000
2016-05-16,0.141000
2023-12-26,0.075000
2016-02-16,0.164000
2016-03-16,0.144000
2016-04-18,0.107000
2020-12-24,0.094000
2024-01-16,0.016000
2024-04-16,0.126000
2024-08-16,0.169000
2017-04-17,0.055000
2019-03-18,0.058000
2019-06-17,0.128000
2014-02-18,0.182000
2018-04-16,0.104000
2024-11-18,0.172000
2016-06-16,0.118000
2017-08-16,0.147000
2018-03-16,0.113000
2012-06-04,0.166000
2018-12-28,0.123000
2022-05-16,0.042000
2022-08-16,0.075000
2025-08-18,0.104000
2014-04-16,0.133000
2014-05-16,0.185000
2020-06-16,0.088000
2016-01-19,0.031000
2019-02-19,0.130000
2022-12-23,0.053000
2014-06-16,0.152000
2015-02-17,0.146000
2015-04-16,0.192000
2023-03-16,0.023000
2025-06-16,0.098000
2015-08-17,0.204000
2017-03-16,0.076000
2020-07-16,0.098000
2024-05-16,0.143000
2025-05-16,0.112000
2012-12-04,0.178000
2013-05-16,0.190000
2014-11-17,0.160000
2018-06-18,0.133000
2019-04-16,0.164000
2020-01-16,0.134000
2020-03-16,0.087000
2022-09-16,0.074000
2013-10-16,0.073000
2015-10-16,0.106000
2016-11-16,0.127000
2024-10-16,0.142000
2025-04-16,0.076000
2026-03-16,0.066000
2023-05-16,0.088000
2023-08-16,0.141000
2023-09-18,0.064000
2018-10-16,0.089000
2020-02-18,0.100000
2020-08-17,0.098000
2022-07-18,0.040000
2025-03-17,0.059000
2014-09-16,0.165000
2015-09-16,0.221000
2017-02-16,0.081000
2017-01-17,0.028000
2019-01-16,0.050000
2021-11-16,0.099000
2023-04-17,0.099000
2013-02-19,0.197000
2015-03-16,0.152000
2015-05-18,0.184000
2023-02-16,0.060000
2014-10-16,0.107000
2018-11-16,0.148000
2019-12-26,0.124000
2018-05-16,0.114000
2018-09-17,0.066000
2024-02-16,0.111000
2021-10-18,0.030000
2025-07-16,0.107000
2017-10-16,0.087000
2018-07-16,0.076000
2018-08-16,0.132000
2024-09-16,0.127000
2025-01-16,0.105000
2026-05-18,0.110000
2026-06-16,0.109000
2013-04-16,0.132000
2016-10-17,0.079000
2021-08-16,0.108000
2020-10-16,0.066000
2021-06-16,0.096000
2023-10-16,0.070000
2024-07-16,0.112000
2012-12-27,0.343000
2015-06-16,0.103000
2015-11-16,0.151000
2023-07-17,0.103000
2013-11-18,0.151000
2017-12-26,0.115000
2022-01-18,0.022000
2025-11-17,0.154000
2013-09-16,0.154000
2020-11-16,0.042000
2021-02-16,0.072000
2018-02-16,0.116000
2020-05-18,0.041000
2021-05-17,0.070000
2023-06-16,0.109000
2024-06-17,0.219000
2013-03-18,0.143000
2014-07-16,0.116000
2016-08-16,0.134000
2017-07-17,0.101000
2021-03-16,0.060000
2021-09-16,0.080000
2023-11-16,0.086000
2014-03-17,0.160000
2014-12-29,0.228000
2015-01-16,0.088000
2023-01-17,0.034000
2025-09-16,0.075000
2017-05-16,0.045000
2017-11-16,0.119000
2021-01-19,0.026000
2022-10-17,0.040000
2024-12-26,0.164000
2012-09-05,0.183000
2013-12-27,0.124000
2020-09-16,0.062000
2020-04-16,0.072000
2012-08-02,0.040000
2013-08-16,0.180000
2015-07-16,0.091000
2022-04-18,0.015000
2022-11-16,0.072000
2026-08-17,0.091000
2013-06-17,0.126000
2019-08-16,0.156000
2021-04-16,0.060000
2021-07-16,0.068000
2018-01-16,0.017000
2019-11-18,0.115000
2024-03-18,0.083000
2026-01-16,0.041000
2012-07-03,0.021000
2014-01-16,0.091000
2017-09-18,0.088000
2022-02-16,0.083000
2025-02-18,0.095000