f/hpq-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

4.2 KiB

Raw Blame History

1	Date	Dividends
2	2011-12-12	0.054496
3	2020-09-08	0.176000
4	2019-03-12	0.160000
5	2020-12-08	0.194000
6	1976-03-18	0.001064
7	1981-09-17	0.001703
8	1983-03-17	0.002129
9	2023-12-12	0.276000
10	2024-06-12	0.276000
11	1977-09-19	0.001419
12	1973-09-18	0.000710
13	2003-09-15	0.036331
14	1997-03-24	0.027248
15	2003-12-15	0.036331
16	2008-03-10	0.036331
17	2015-06-08	0.079927
18	1983-06-16	0.002129
19	2000-06-19	0.036331
20	2009-12-14	0.036331
21	2012-09-10	0.059946
22	1999-09-20	0.036331
23	2013-12-09	0.065849
24	1987-09-17	0.003690
25	2005-03-14	0.036331
26	2005-12-12	0.036331
27	1970-03-25	0.001419
28	2015-09-04	0.079927
29	2022-06-07	0.250000
30	2024-03-12	0.276000
31	2023-06-13	0.263000
32	2008-09-08	0.036331
33	1982-12-16	0.002129
34	1999-06-21	0.036331
35	2009-09-14	0.036331
36	1982-09-16	0.001703
37	1984-03-15	0.002554
38	1990-12-19	0.005960
39	1996-06-17	0.027248
40	2000-12-18	0.036331
41	2010-09-13	0.036331
42	2021-03-09	0.194000
43	1992-06-18	0.011353
44	2002-09-16	0.036331
45	1991-12-20	0.007096
46	2010-12-13	0.036331
47	2023-09-12	0.263000
48	1970-09-25	0.000710
49	2000-09-18	0.036331
50	2001-03-19	0.036331
51	2005-09-12	0.036331
52	1975-09-18	0.001064
53	1987-03-19	0.003122
54	2010-06-14	0.036331
55	2016-06-13	0.124000
56	1985-09-12	0.003122
57	1984-06-14	0.002554
58	2007-12-10	0.036331
59	2025-06-11	0.289000
60	1979-03-22	0.001064
61	2009-06-08	0.036331
62	1979-09-20	0.001419
63	2015-12-07	0.124000
64	2021-06-08	0.194000
65	1991-09-19	0.007096
66	1986-09-18	0.003122
67	1992-09-17	0.011353
68	1993-09-16	0.014192
69	1999-12-20	0.036331
70	2001-06-18	0.036331
71	1999-03-22	0.036331
72	1994-06-16	0.017030
73	2012-12-10	0.059946
74	1982-06-17	0.001703
75	1993-03-18	0.011353
76	2000-06-05	7.079700
77	2011-06-13	0.054496
78	2004-12-13	0.036331
79	1972-10-04	0.050778
80	2016-03-07	0.124000
81	2016-12-12	0.133000
82	2017-06-12	0.133000
83	2025-03-12	0.289000
84	2026-06-10	0.300000
85	1980-09-18	0.001419
86	1998-06-22	0.036331
87	2008-06-09	0.036331
88	2019-12-10	0.176000
89	1971-03-26	0.000710
90	1988-12-15	0.004825
91	2007-03-12	0.036331
92	2012-03-12	0.054496
93	2006-09-11	0.036331
94	2025-12-11	0.300000
95	1987-12-17	0.003690
96	2005-06-13	0.036331
97	1980-03-21	0.001419
98	1977-03-17	0.001419
99	1984-12-13	0.003122
100	1990-06-14	0.005960
101	2021-09-07	0.194000
102	1975-03-18	0.000710
103	2001-09-17	0.036331
104	2003-06-16	0.036331
105	2008-12-15	0.036331
106	1974-03-19	0.000710
107	1978-06-16	0.001064
108	1971-09-20	0.000710
109	1985-12-12	0.003122
110	1986-06-12	0.003122
111	1987-06-18	0.003122
112	1989-12-14	0.005960
113	1994-09-15	0.017030
114	2010-03-15	0.036331
115	1996-09-23	0.027248
116	1997-12-22	0.031789
117	1995-06-19	0.022707
118	1994-12-15	0.017030
119	1997-06-16	0.031789
120	2017-09-12	0.133000
121	1993-12-16	0.014192
122	2017-12-12	0.139000
123	2025-09-10	0.289000
124	1972-09-19	0.000710
125	1988-09-16	0.003690
126	1989-06-14	0.004825
127	2011-09-12	0.054496
128	2026-03-11	0.300000
129	1988-03-17	0.003690
130	1981-12-16	0.001703
131	1990-09-20	0.005960
132	2006-03-13	0.036331
133	2014-09-08	0.072661
134	2023-03-07	0.263000
135	1991-03-14	0.007096
136	2004-06-14	0.036331
137	2017-03-06	0.133000
138	2018-06-12	0.139000
139	2022-09-13	0.250000
140	1978-09-18	0.001064
141	1985-06-13	0.003122
142	1992-03-19	0.011353
143	1995-12-18	0.022707
144	2002-06-17	0.036331
145	2002-12-16	0.036331
146	2003-03-17	0.036331
147	2013-06-10	0.065849
148	2009-03-09	0.036331
149	2022-12-13	0.263000
150	1998-09-21	0.036331
151	1991-06-13	0.007096
152	1997-09-22	0.031789
153	1981-03-19	0.001419
154	2015-03-09	0.072661
155	2020-03-10	0.176000
156	2006-06-12	0.036331
157	2021-12-07	0.250000
158	1988-06-16	0.003690
159	1980-12-18	0.001419
160	2000-03-20	0.036331
161	2013-03-11	0.059946
162	2018-12-12	0.160000
163	1976-09-20	0.001064
164	1989-03-16	0.004825
165	1996-12-20	0.027248
166	2016-09-12	0.124000
167	1973-03-20	0.000710
168	2013-09-09	0.065849
169	1982-03-18	0.001703
170	1979-06-21	0.000710
171	1998-03-23	0.031789
172	2006-12-11	0.036331
173	2022-03-08	0.250000
174	1980-06-19	0.001419
175	1986-03-13	0.003122
176	1996-03-18	0.022707
177	2014-03-10	0.065849
178	2018-03-13	0.139000
179	2020-06-09	0.176000
180	2002-03-04	0.036331
181	2004-03-15	0.036331
182	2019-09-10	0.160000
183	1983-12-15	0.002554
184	1984-09-13	0.003122
185	1990-03-15	0.005960
186	1995-09-18	0.022707
187	1983-09-15	0.002554
188	2007-06-11	0.036331
189	2024-12-11	0.289000
190	1981-06-11	0.000851
191	1985-03-14	0.003122
192	1972-03-20	0.000710
193	2001-12-17	0.036331
194	2018-09-11	0.139000
195	1979-12-19	0.001419
196	1978-12-20	0.001064
197	2004-09-13	0.036331
198	2011-03-14	0.036331
199	2019-06-11	0.160000
200	1994-03-17	0.014192
201	2012-06-11	0.059946
202	2014-06-09	0.072661
203	1993-06-17	0.014192
204	1986-12-17	0.003122
205	1998-12-21	0.036331
206	2014-12-08	0.072661
207	1974-09-18	0.000710
208	1989-09-14	0.005960
209	2007-09-10	0.036331
210	1978-03-16	0.001419
211	1992-12-17	0.011353
212	1995-03-16	0.018733
213	2024-09-11	0.276000

4.2 KiB Raw Blame History

4.2 KiB

Raw Blame History