f/hiabx-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

4.0 KiB

Raw Blame History

1	Date	Dividends
2	1995-06-30	0.560000
3	2016-08-25	0.338000
4	1991-07-31	0.720000
5	1991-10-31	0.570000
6	1991-12-31	0.690000
7	1992-07-31	0.640000
8	1994-05-31	0.510000
9	2017-08-24	0.340000
10	1988-09-30	0.640000
11	1990-03-30	0.610000
12	1985-12-31	0.890000
13	1986-07-31	0.770000
14	1987-01-30	0.680000
15	1996-12-31	0.590000
16	2020-08-27	0.482000
17	1983-06-30	0.840000
18	1984-11-30	0.830000
19	1993-05-28	0.500000
20	1996-07-31	0.530000
21	1999-12-31	5.700000
22	2018-08-23	0.479000
23	1986-12-31	0.780000
24	1989-11-30	0.600000
25	1985-05-31	0.890000
26	1985-07-31	0.910000
27	1987-02-27	0.640000
28	1987-03-31	0.700000
29	1993-10-29	0.480000
30	2007-12-17	0.599000
31	1982-01-29	11.100000
32	1984-12-31	0.880000
33	1992-05-29	0.590000
34	1994-01-31	2.320000
35	1996-01-31	0.530000
36	1983-01-31	16.160000
37	1984-06-29	0.840000
38	2007-06-22	0.011000
39	1987-08-31	0.690000
40	1995-11-30	0.520000
41	1994-06-30	0.510000
42	1997-01-31	0.550000
43	1989-05-31	0.730000
44	1992-01-31	2.440000
45	1986-01-31	0.840000
46	1989-02-28	0.630000
47	1992-09-30	0.610000
48	1995-08-31	0.530000
49	1984-01-31	0.820000
50	1985-06-28	0.780000
51	1990-05-31	0.620000
52	1991-05-31	0.590000
53	1991-09-30	0.570000
54	2015-08-19	0.636000
55	2024-08-23	0.351000
56	1985-10-31	0.860000
57	1987-05-29	0.640000
58	1988-02-29	0.650000
59	1991-02-28	0.560000
60	1994-07-29	0.510000
61	1987-06-30	0.700000
62	1987-10-30	0.660000
63	1986-09-30	0.750000
64	1997-04-30	0.550000
65	1989-09-29	0.620000
66	1993-04-30	0.510000
67	1994-11-30	0.510000
68	1996-05-31	0.550000
69	1996-10-31	0.520000
70	1997-12-31	3.800000
71	1987-12-31	0.660000
72	1988-05-31	0.670000
73	1990-09-28	0.550000
74	1995-05-31	0.540000
75	1988-04-29	0.620000
76	1992-03-31	0.630000
77	1990-06-29	0.580000
78	1991-06-28	0.480000
79	1994-08-30	0.510000
80	2021-08-27	0.580000
81	1983-05-31	4.170000
82	1984-10-31	0.940000
83	1995-10-31	0.530000
84	2005-12-19	0.491000
85	1985-03-29	0.850000
86	1990-10-31	0.650000
87	1988-01-29	0.600000
88	1992-10-30	0.590000
89	1995-07-31	0.510000
90	1995-09-29	0.540000
91	1998-02-27	0.270000
92	2019-08-27	0.453000
93	1986-06-30	0.790000
94	1987-09-30	0.660000
95	1989-03-31	0.710000
96	1993-01-29	2.500000
97	1996-03-29	0.540000
98	2008-06-23	0.036000
99	1984-04-30	0.870000
100	1985-02-28	0.810000
101	1986-04-30	0.800000
102	1994-09-30	0.540000
103	1995-03-31	0.580000
104	1996-11-29	0.480000
105	1997-03-31	0.600000
106	1998-12-31	5.180000
107	1984-03-30	0.840000
108	1985-01-31	0.900000
109	1986-03-31	0.850000
110	1986-10-31	0.720000
111	1987-04-30	0.660000
112	1988-12-30	0.670000
113	1984-07-31	0.860000
114	1984-09-28	0.790000
115	1989-04-28	0.630000
116	1992-06-30	0.620000
117	1984-08-31	0.840000
118	1988-06-30	0.620000
119	1989-10-31	0.670000
120	1990-12-31	0.880000
121	1992-02-28	0.600000
122	1993-07-30	0.480000
123	1994-12-30	0.500000
124	1995-04-28	0.510000
125	1984-05-31	0.900000
126	1985-08-30	0.830000
127	2003-06-26	0.506000
128	2022-08-26	0.429000
129	2025-08-25	0.536000
130	1996-04-30	0.520000
131	1999-02-26	0.800000
132	1986-02-28	0.790000
133	1987-07-31	0.680000
134	1989-06-30	0.650000
135	1989-07-31	0.670000
136	1990-08-31	0.620000
137	1991-01-31	0.620000
138	1983-08-31	0.910000
139	1983-09-30	0.820000
140	2006-12-13	0.521000
141	1996-06-28	0.480000
142	2000-06-30	0.470000
143	1991-08-30	0.620000
144	1992-04-30	0.640000
145	1994-03-31	0.530000
146	1996-02-29	0.520000
147	1996-09-30	0.470000
148	1983-11-30	0.810000
149	1986-05-30	0.740000
150	1994-04-29	0.460000
151	2004-06-29	0.900000
152	1986-11-28	0.600000
153	1992-08-31	0.630000
154	1993-02-26	0.530000
155	1993-08-31	0.520000
156	1993-11-30	0.500000
157	1995-12-29	0.570000
158	1985-09-30	0.880000
159	1988-08-31	0.720000
160	1988-03-31	0.650000
161	1988-07-29	0.630000
162	1989-01-31	0.690000
163	1990-02-28	0.570000
164	1991-03-28	0.590000
165	1993-12-31	0.490000
166	1983-12-30	0.840000
167	1987-11-30	0.680000
168	1997-02-28	0.540000
169	2008-12-16	0.707000
170	1985-11-29	0.810000
171	1988-10-31	0.630000
172	1990-04-30	0.630000
173	1991-04-30	0.670000
174	1992-11-30	0.630000
175	1992-12-31	0.610000
176	1980-01-31	6.910000
177	1985-04-30	0.930000
178	2004-08-31	0.043000
179	2023-08-25	0.327000
180	1993-06-30	0.550000
181	1995-02-28	0.490000
182	1989-12-29	0.620000
183	1990-11-30	0.570000
184	1991-11-29	0.570000
185	1993-03-31	0.600000
186	1996-08-30	0.550000
187	2009-12-17	0.402000
188	1983-07-29	0.810000
189	1986-08-29	0.690000
190	1989-08-31	0.660000
191	1994-02-28	0.450000
192	2005-06-22	0.388000
193	1981-01-30	9.570000
194	1983-10-31	0.850000
195	1990-01-31	0.620000
196	1990-07-31	0.620000
197	1993-09-30	0.460000
198	1994-10-31	0.480000
199	1995-01-31	0.540000
200	2001-06-27	5.570000
201	1984-02-28	0.800000
202	1988-11-30	0.640000
203	2006-06-22	0.048000

4.0 KiB Raw Blame History

4.0 KiB

Raw Blame History