f/cshix-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

5.9 KiB

Raw Blame History

1	Date	Dividends
2	2024-05-31	0.049000
3	2018-04-30	0.025000
4	2021-09-30	0.020000
5	2019-08-30	0.029000
6	2020-11-30	0.020000
7	2021-01-29	0.022000
8	2026-05-29	0.036000
9	2019-02-28	0.027000
10	2020-05-29	0.026000
11	2020-12-31	0.022000
12	2026-04-30	0.037000
13	2014-03-31	0.024000
14	2017-07-31	0.026000
15	2020-03-31	0.028000
16	2022-04-29	0.021000
17	2005-12-09	0.220000
18	2006-07-31	0.052000
19	2011-09-30	0.025000
20	2011-11-30	0.019000
21	2014-06-30	0.023000
22	2022-10-31	0.038000
23	2024-04-30	0.048000
24	2003-12-31	0.071000
25	2004-12-31	0.093000
26	2019-09-30	0.028000
27	2023-09-29	0.048000
28	2003-01-31	0.064000
29	2008-10-31	0.049000
30	2014-04-30	0.022000
31	2004-05-28	0.063000
32	2016-07-29	0.028000
33	2017-01-31	0.025000
34	2025-12-31	0.039000
35	2005-07-29	0.053000
36	2015-07-31	0.025000
37	2018-11-30	0.027000
38	2019-01-31	0.030000
39	2013-03-28	0.029000
40	2016-11-30	0.025000
41	2020-01-31	0.028000
42	2023-02-28	0.040000
43	2003-05-30	0.059000
44	2004-09-29	0.052000
45	2010-10-29	0.045000
46	2012-09-28	0.027000
47	2012-10-31	0.028000
48	2019-07-31	0.029000
49	2019-11-29	0.026000
50	2004-03-31	0.060000
51	2025-03-31	0.040000
52	2003-10-31	0.050000
53	2006-02-28	0.050000
54	2006-05-31	0.048000
55	2024-06-28	0.047000
56	2025-09-30	0.036000
57	2026-01-30	0.037000
58	2000-12-29	0.074000
59	2007-03-30	0.054000
60	2014-10-31	0.025000
61	2018-02-28	0.023000
62	2020-06-30	0.025000
63	2000-10-31	0.067000
64	2010-06-30	0.041000
65	2007-09-28	0.051000
66	2010-03-31	0.045000
67	2012-05-31	0.029000
68	2018-12-31	0.029000
69	2020-07-31	0.022000
70	2021-11-30	0.018000
71	2023-04-28	0.046000
72	2025-08-29	0.038000
73	2007-04-30	0.054000
74	2012-01-31	0.024000
75	2012-08-31	0.030000
76	2018-06-29	0.024000
77	2022-07-29	0.029000
78	2022-09-30	0.032000
79	2005-10-31	0.055000
80	2006-08-31	0.057000
81	2011-08-31	0.024000
82	2014-12-12	0.004000
83	2019-04-30	0.028000
84	2025-02-28	0.037000
85	2003-02-28	0.060000
86	2007-10-31	0.053000
87	2007-12-31	0.051000
88	2012-02-29	0.025000
89	2021-03-31	0.021000
90	2003-08-29	0.058000
91	2017-03-31	0.024000
92	2023-12-29	0.050000
93	2025-11-28	0.036000
94	2010-09-30	0.047000
95	2024-08-30	0.048000
96	2024-10-31	0.046000
97	2010-12-31	0.049000
98	2012-12-31	0.037000
99	2013-01-31	0.027000
100	2013-09-30	0.022000
101	2021-06-30	0.019000
102	2007-05-31	0.050000
103	2013-08-30	0.024000
104	2013-10-31	0.024000
105	2015-08-31	0.023000
106	2025-01-31	0.043000
107	2025-06-30	0.039000
108	2012-07-31	0.030000
109	2012-03-30	0.027000
110	2024-09-30	0.046000
111	2026-03-31	0.041000
112	2008-03-31	0.051000
113	2005-11-30	0.060000
114	2007-07-31	0.051000
115	2011-03-31	0.044000
116	2014-07-31	0.024000
117	2015-06-30	0.026000
118	2016-05-31	0.028000
119	2020-10-30	0.024000
120	2005-09-30	0.052000
121	2012-11-30	0.029000
122	2014-09-30	0.023000
123	2017-04-28	0.023000
124	2017-06-30	0.022000
125	2022-06-30	0.024000
126	2007-06-29	0.055000
127	2023-08-31	0.051000
128	2025-04-30	0.040000
129	2018-07-31	0.025000
130	2004-07-30	0.059000
131	2009-07-31	0.039000
132	2013-04-30	0.024000
133	2018-05-31	0.025000
134	2021-08-31	0.022000
135	2022-01-31	0.019000
136	2024-02-29	0.050000
137	2000-08-31	0.073000
138	2009-01-30	0.045000
139	2016-04-29	0.028000
140	2019-10-31	0.030000
141	2006-11-30	0.051000
142	2011-12-30	0.033000
143	2008-01-31	0.051000
144	2017-02-28	0.022000
145	2018-10-31	0.027000
146	2020-04-30	0.026000
147	2023-03-31	0.046000
148	2016-10-31	0.027000
149	2017-11-30	0.021000
150	2005-02-28	0.057000
151	2013-07-31	0.026000
152	2015-02-27	0.023000
153	2026-07-31	0.036000
154	2009-11-30	0.043000
155	2010-05-28	0.043000
156	2017-08-31	0.021000
157	2021-10-29	0.019000
158	2008-09-30	0.047000
159	2006-01-31	0.049000
160	2008-07-31	0.050000
161	2009-09-30	0.043000
162	2010-07-30	0.042000
163	2011-02-28	0.046000
164	2013-02-28	0.029000
165	2016-06-30	0.027000
166	2004-11-30	0.059000
167	2023-05-31	0.048000
168	2024-11-29	0.042000
169	2025-07-31	0.038000
170	2022-08-31	0.031000
171	2001-02-28	0.068000
172	2006-06-30	0.052000
173	2006-09-29	0.049000
174	2009-05-29	0.045000
175	2011-05-31	0.043000
176	2001-01-31	0.074000
177	2008-08-29	0.048000
178	2009-12-31	0.101000
179	2014-01-31	0.024000
180	2015-09-30	0.023000
181	2024-12-31	0.044000
182	2004-04-30	0.061000
183	2009-06-30	0.037000
184	2009-08-31	0.043000
185	2015-10-30	0.026000
186	2023-10-31	0.051000
187	2005-08-31	0.054000
188	2008-04-30	0.050000
189	2010-11-30	0.047000
190	2018-03-29	0.026000
191	2022-03-31	0.021000
192	2000-09-29	0.071000
193	2026-02-27	0.034000
194	2005-01-31	0.057000
195	2004-01-30	0.059000
196	2004-10-29	0.058000
197	2007-12-11	0.238000
198	2003-11-28	0.061000
199	2006-10-31	0.052000
200	2006-12-29	0.085000
201	2013-05-31	0.025000
202	2015-03-31	0.025000
203	2015-12-31	0.028000
204	2016-08-31	0.028000
205	2021-02-26	0.019000
206	2004-12-10	0.127000
207	2024-07-31	0.048000
208	2009-04-30	0.048000
209	2010-08-31	0.042000
210	2014-02-28	0.023000
211	2021-12-31	0.020000
212	2006-12-08	0.036000
213	2006-04-28	0.051000
214	2004-08-31	0.056000
215	2002-10-31	0.045000
216	2019-06-28	0.030000
217	2001-03-30	0.074000
218	2020-08-31	0.023000
219	2016-12-30	0.025000
220	2007-01-31	0.050000
221	2011-04-29	0.042000
222	2022-05-31	0.024000
223	2024-01-31	0.050000
224	2024-03-28	0.050000
225	2004-06-30	0.062000
226	2008-02-29	0.047000
227	2013-06-28	0.027000
228	2018-09-28	0.024000
229	2020-02-28	0.026000
230	2021-04-30	0.021000
231	2021-07-30	0.019000
232	2022-11-30	0.039000
233	2003-04-30	0.054000
234	2023-01-31	0.044000
235	2022-12-30	0.043000
236	2016-09-30	0.026000
237	2022-02-28	0.018000
238	2023-06-30	0.048000
239	2004-02-27	0.059000
240	2009-02-27	0.046000
241	2010-01-29	0.042000
242	2014-11-28	0.025000
243	2014-12-31	0.025000
244	2003-06-30	0.060000
245	2025-05-30	0.040000
246	2002-11-29	0.056000
247	2006-03-31	0.051000
248	2011-06-30	0.029000
249	2000-11-30	0.070000
250	2003-07-31	0.059000
251	2005-05-31	0.058000
252	2005-12-30	0.067000
253	2011-10-31	0.022000
254	2013-11-29	0.023000
255	2015-04-30	0.024000
256	2016-01-29	0.028000
257	2002-12-31	0.060000
258	2019-12-31	0.028000
259	2021-05-28	0.019000
260	2016-03-31	0.027000
261	2010-02-26	0.046000
262	2005-03-31	0.057000
263	2008-05-30	0.049000
264	2008-06-30	0.051000
265	2008-11-28	0.045000
266	2017-09-29	0.024000
267	2018-01-31	0.025000
268	2001-04-30	0.073000
269	2013-12-31	0.025000
270	2017-10-31	0.023000
271	2018-08-31	0.025000
272	2019-05-31	0.030000
273	2020-09-30	0.019000
274	2005-04-29	0.057000
275	2015-11-30	0.024000
276	2023-11-30	0.048000
277	2015-05-29	0.025000
278	2008-12-31	0.108000
279	2012-06-29	0.026000
280	2017-05-31	0.023000
281	2017-12-29	0.023000
282	2025-10-31	0.037000
283	2007-02-28	0.052000
284	2011-01-31	0.045000
285	2011-07-29	0.021000
286	2015-01-30	0.025000
287	2026-06-30	0.035000
288	2005-06-30	0.053000
289	2007-08-31	0.051000
290	2014-05-30	0.023000
291	2019-03-29	0.031000
292	2003-09-30	0.055000
293	2012-04-30	0.024000
294	2023-07-31	0.052000
295	2009-03-31	0.049000
296	2007-11-30	0.052000
297	2009-10-30	0.047000
298	2003-03-31	0.057000
299	2016-02-29	0.026000
300	2014-08-29	0.024000

5.9 KiB Raw Blame History

5.9 KiB

Raw Blame History