f/mittx-dividend.csv at bb8e39605ef99b652f313b9fbf152f26d568e613

gmp/f

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

3.2 KiB

Raw Blame History

1	Date	Dividends
2	1992-03-31	0.084000
3	1998-03-27	0.245000
4	2009-03-12	0.054000
5	2009-12-17	0.173000
6	1974-06-28	0.094000
7	1979-09-28	0.125000
8	1982-09-30	0.140000
9	1990-03-30	0.100000
10	2013-12-17	0.535000
11	2007-03-14	0.292000
12	2019-12-17	2.113000
13	1977-09-30	0.105000
14	1981-11-20	0.156000
15	1982-06-30	0.138000
16	2000-06-28	0.004000
17	1986-06-30	0.100000
18	1986-12-09	0.100000
19	1989-12-29	0.157000
20	1994-09-28	0.062000
21	1977-03-31	0.098000
22	1983-06-30	0.113000
23	1984-06-29	0.113000
24	1985-09-30	0.114000
25	2023-07-31	0.349000
26	1994-12-28	0.064000
27	2000-12-04	0.698000
28	2006-03-23	0.007000
29	2022-07-29	0.885000
30	1976-06-30	0.083000
31	1988-09-30	0.100000
32	1993-12-28	0.178000
33	2002-03-28	0.012000
34	1973-06-29	0.093000
35	1993-09-28	0.070000
36	2001-03-28	0.143000
37	2018-12-18	3.554000
38	1976-09-30	0.088000
39	1992-12-28	0.078000
40	2010-12-16	0.100000
41	2012-12-18	0.682000
42	2015-12-17	1.463000
43	1978-06-30	0.110000
44	1990-06-29	0.105000
45	1991-12-27	0.098000
46	2010-03-11	0.032000
47	1980-06-30	0.135000
48	2025-07-31	0.857000
49	2025-12-18	4.233000
50	1984-03-30	0.113000
51	1989-03-31	0.090000
52	1993-03-29	0.069000
53	1995-09-28	0.063000
54	1991-03-28	0.095000
55	1992-06-30	0.088000
56	2007-12-20	1.446000
57	2017-12-19	1.965000
58	2008-03-14	0.277000
59	1982-11-19	0.147000
60	1983-11-18	0.125000
61	1996-03-27	0.050000
62	1998-06-26	0.040000
63	1981-03-31	0.137000
64	2024-12-19	4.750000
65	1979-11-23	0.140000
66	1988-12-30	0.100000
67	1991-06-28	0.098000
68	2003-12-02	0.070000
69	2005-03-24	0.007000
70	2011-12-15	0.102000
71	2019-06-28	0.373000
72	1974-09-30	0.100000
73	1974-11-29	0.117000
74	1997-12-23	1.313000
75	2000-09-27	0.004000
76	1996-06-26	0.050000
77	1999-12-10	0.502000
78	2022-12-13	2.107000
79	1975-06-30	0.090000
80	1977-11-25	0.110000
81	1979-03-30	0.115000
82	1986-03-31	0.100000
83	1995-12-27	0.065000
84	1999-06-25	0.014000
85	2021-12-14	3.163000
86	1975-03-31	0.098000
87	1975-09-30	0.086000
88	1978-11-24	0.123000
89	1990-09-28	0.105000
90	2006-12-21	0.168000
91	2011-05-31	0.091000
92	2016-06-30	0.207000
93	2023-12-21	3.411000
94	1976-11-26	0.103000
95	1978-09-29	0.110000
96	1981-09-30	0.145000
97	1988-03-31	0.095000
98	1995-06-28	0.063000
99	1996-12-23	1.378000
100	2014-05-30	0.230000
101	2016-12-20	1.509000
102	1982-03-31	0.138000
103	1988-06-30	0.095000
104	1992-09-30	0.088000
105	1994-06-28	0.060000
106	2021-06-30	0.445000
107	2024-07-31	0.438000
108	1975-11-28	0.090000
109	1977-06-30	0.105000
110	1990-12-28	0.115000
111	2014-12-18	1.699000
112	1980-09-30	0.135000
113	1981-06-30	0.137000
114	1989-09-29	0.105000
115	2018-06-29	0.150000
116	1983-03-31	0.113000
117	1984-11-23	0.122000
118	2001-12-04	0.050000
119	1980-03-31	0.135000
120	1989-06-30	0.100000
121	1997-03-27	0.041000
122	1998-09-28	0.040000
123	1974-03-29	0.094000
124	1976-03-31	0.086000
125	1985-11-22	0.122000
126	1987-12-31	0.100000
127	1996-09-26	0.050000
128	2015-06-30	0.180000
129	1973-11-30	0.110000
130	1980-11-21	0.150000
131	1984-09-28	0.113000
132	1991-09-30	0.098000
133	2004-03-25	0.042000
134	2020-12-15	1.360000
135	1973-09-28	0.095000
136	1987-03-31	0.095000
137	1993-06-28	0.070000
138	1997-06-26	0.050000
139	2026-07-31	0.485000
140	1979-06-29	0.125000
141	1998-12-10	0.886000
142	2002-12-03	0.055000
143	2017-06-30	0.374000
144	1978-03-31	0.105000
145	1986-09-30	0.100000
146	2000-03-29	0.149000
147	2012-05-31	0.091000
148	1987-09-30	0.100000
149	1995-03-29	0.060000
150	1999-09-28	0.027000
151	2003-03-26	0.021000
152	2008-12-18	0.181000
153	2020-06-30	0.196000
154	1983-09-30	0.115000
155	1985-03-29	0.113000
156	1994-03-29	0.060000
157	1999-03-26	0.135000
158	2005-12-05	0.061000
159	1985-06-28	0.114000
160	1987-06-30	0.100000
161	1997-09-26	0.050000
162	2004-12-02	0.108000
163	2013-05-31	0.047000

3.2 KiB Raw Blame History

3.2 KiB

Raw Blame History