f/hstax-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	1988-02-29	0.580000
3	1991-01-31	5.880000
4	1991-05-31	0.710000
5	1991-07-31	0.220000
6	1996-11-29	0.550000
7	1984-06-29	0.040000
8	1990-02-28	0.770000
9	1997-04-30	0.270000
10	1987-04-30	0.210000
11	1988-11-30	0.540000
12	1993-11-30	0.640000
13	2016-08-25	0.096000
14	1986-03-31	0.370000
15	1987-08-31	0.560000
16	1988-09-30	0.430000
17	1992-04-30	0.070000
18	1995-04-28	0.350000
19	1998-12-31	4.850000
20	1987-02-27	0.050000
21	1996-07-31	0.500000
22	1988-12-30	0.050000
23	1994-10-31	0.340000
24	2009-12-17	0.442000
25	1984-01-31	16.900000
26	1993-02-26	0.510000
27	2006-12-13	0.703000
28	1983-08-31	0.610000
29	1992-06-30	0.750000
30	1989-02-28	0.510000
31	1989-11-30	0.550000
32	1993-01-29	2.070000
33	1994-03-31	0.560000
34	1995-01-31	11.870000
35	1995-10-31	0.440000
36	1996-10-31	0.230000
37	2008-12-16	0.740000
38	1988-07-29	0.010000
39	1993-08-31	0.610000
40	1996-02-29	0.460000
41	1982-01-29	0.580000
42	1987-07-31	0.130000
43	1993-09-30	0.590000
44	1994-06-30	0.570000
45	1994-08-31	0.670000
46	1997-01-31	0.310000
47	1992-02-28	0.050000
48	1995-07-31	0.410000
49	1999-12-31	6.190000
50	1989-03-31	0.390000
51	1997-03-31	0.300000
52	1983-11-30	0.550000
53	1984-11-30	0.590000
54	1986-08-29	0.060000
55	1986-10-31	0.100000
56	1995-08-31	0.740000
57	2025-12-19	1.408000
58	2008-06-23	0.068000
59	2024-08-23	3.232000
60	1984-04-30	0.140000
61	1985-05-31	0.910000
62	1989-04-28	0.030000
63	2023-08-25	4.761000
64	1991-04-30	0.220000
65	2014-12-22	1.123000
66	1987-03-31	0.390000
67	1996-08-30	0.500000
68	1990-12-31	0.670000
69	1984-02-28	0.640000
70	1989-10-31	0.360000
71	2022-08-26	10.793000
72	1980-01-31	4.530000
73	1993-07-30	0.200000
74	1995-11-30	0.660000
75	1997-12-31	3.350000
76	2000-12-28	5.620000
77	2023-12-22	1.252000
78	1999-02-26	54.660000
79	1983-12-30	0.020000
80	1986-07-31	0.240000
81	1991-12-31	0.520000
82	1983-09-30	0.270000
83	1984-08-31	0.780000
84	1984-12-31	0.440000
85	1990-05-31	0.980000
86	1995-06-30	0.690000
87	1983-10-31	0.250000
88	1989-12-29	0.070000
89	2003-06-26	0.038000
90	2017-12-20	1.338000
91	1984-07-31	0.380000
92	1987-05-29	0.070000
93	1987-10-30	0.010000
94	2025-08-25	13.346000
95	1990-08-31	0.700000
96	1993-04-30	0.190000
97	1994-02-28	0.560000
98	2004-06-29	0.016000
99	1985-04-30	0.280000
100	1985-12-31	0.430000
101	1988-03-31	0.360000
102	1995-12-29	0.580000
103	1990-10-31	0.270000
104	2005-12-19	0.617000
105	1992-11-30	0.590000
106	2004-12-15	0.474000
107	2024-12-20	1.482000
108	1989-09-29	0.060000
109	1993-12-31	0.440000
110	2021-08-27	3.569000
111	1985-03-29	0.050000
112	1990-11-30	0.640000
113	1986-12-31	0.350000
114	1992-08-31	0.630000
115	1995-05-31	0.730000
116	1996-04-30	0.380000
117	2018-12-21	1.271000
118	1986-01-31	12.870000
119	2022-12-21	1.388000
120	1985-07-31	0.230000
121	1996-09-30	0.580000
122	2017-08-24	0.042000
123	1983-05-31	2.680000
124	1988-05-31	0.760000
125	1994-11-30	0.730000
126	1997-02-28	22.340000
127	2018-08-23	0.056000
128	1985-06-28	0.040000
129	1988-08-31	0.580000
130	1990-01-31	14.680000
131	2015-08-19	0.076000
132	2019-08-27	7.659000
133	1988-06-30	0.370000
134	1985-01-31	6.780000
135	1987-11-30	0.560000
136	1998-02-26	18.620000
137	1984-05-31	0.940000
138	1985-10-31	0.240000
139	1990-04-30	0.250000
140	2003-12-29	0.439000
141	2006-06-22	0.009000
142	1986-05-30	0.080000
143	1987-12-31	18.730000
144	1993-06-30	0.570000
145	2020-08-27	6.251000
146	1985-09-30	0.360000
147	1991-08-30	0.060000
148	1992-03-31	0.600000
149	1996-03-29	0.540000
150	2007-12-17	0.527000
151	1984-10-31	0.370000
152	1991-11-29	0.060000
153	2015-12-22	1.102000
154	1984-03-30	0.030000
155	1989-01-31	5.820000
156	1990-03-30	0.070000
157	1991-03-28	0.070000
158	2019-12-23	1.693000
159	1983-01-31	8.960000
160	1986-02-28	0.770000
161	1988-04-29	0.010000
162	2009-08-27	0.048000
163	1981-01-30	0.470000
164	1989-06-30	0.840000
165	1990-09-28	0.070000
166	1991-09-30	0.470000
167	1985-08-30	0.080000
168	1996-06-28	0.430000
169	1996-12-31	0.470000
170	1986-06-30	0.340000
171	1987-01-30	1.030000
172	1992-01-31	18.120000
173	1992-09-30	0.750000
174	1995-02-28	0.610000
175	1988-01-29	0.010000
176	1990-07-31	0.390000
177	1987-06-30	0.390000
178	1994-01-31	18.900000
179	2016-12-21	1.166000
180	1992-05-29	0.040000
181	1994-09-30	0.620000
182	1996-01-31	15.290000
183	2021-12-22	1.618000
184	1985-11-29	0.070000
185	1988-10-31	0.120000
186	1993-03-31	0.600000
187	1996-05-31	0.700000
188	2020-12-21	1.407000
189	1987-09-30	0.400000
190	1992-12-31	0.610000
191	2007-06-19	0.047000
192	1983-07-29	0.010000
193	1986-09-30	0.350000
194	1986-11-28	0.050000
195	1992-07-31	0.110000
196	1994-05-31	0.590000
197	1994-12-30	0.720000
198	1995-09-29	0.610000
199	1995-03-31	0.720000
200	1984-09-28	0.060000
201	1985-02-28	0.630000
202	1991-02-28	0.640000
203	1994-07-29	0.260000
204	2005-06-22	0.278000
205	1990-06-29	0.070000
206	1991-06-28	0.070000
207	1991-10-31	0.260000
208	1986-04-30	0.230000
209	1993-10-29	0.210000
210	2000-06-28	75.030000
211	1983-06-30	0.280000
212	1989-05-31	0.920000
213	1989-08-31	0.750000
214	1993-05-28	0.520000
215	1994-04-29	0.230000

4.2 KiB Raw Blame History

4.2 KiB

Raw Blame History