f/cybax-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

4.9 KiB

Raw Blame History

1	Date	Dividends
2	2007-02-26	0.128000
3	2015-03-26	0.114000
4	2026-07-31	0.116000
5	2002-12-20	0.340000
6	2009-08-27	0.143000
7	2015-07-30	0.113000
8	2022-06-30	0.094000
9	2006-11-13	0.440000
10	2014-07-30	0.135000
11	2015-11-24	0.119000
12	2016-10-27	0.115000
13	2008-12-23	0.168000
14	2014-03-27	0.124000
15	2014-06-26	0.131000
16	2017-08-30	0.114000
17	2024-11-29	0.113000
18	2009-10-29	0.126000
19	2011-11-22	0.157000
20	2019-06-28	0.103000
21	2020-03-31	0.095000
22	2023-01-31	0.099000
23	2025-10-31	0.118000
24	2005-02-22	0.200000
25	2013-05-30	0.126000
26	2016-01-28	0.108000
27	2017-11-29	0.111000
28	2018-10-29	0.106000
29	2023-12-29	0.122000
30	2024-10-31	0.117000
31	2007-08-20	0.391000
32	2011-06-29	0.160000
33	2014-11-25	0.138000
34	2019-12-31	0.101000
35	2021-07-30	0.089000
36	2013-06-27	0.148000
37	2014-05-29	0.123000
38	2016-04-28	0.120000
39	2014-12-11	0.720000
40	2025-12-31	0.115000
41	2006-12-18	0.264000
42	2007-12-20	0.299000
43	2016-02-25	0.116000
44	2016-08-30	0.123000
45	2018-02-26	0.091000
46	2011-04-28	0.146000
47	2016-05-26	0.122000
48	2022-01-31	0.083000
49	2015-09-24	0.115000
50	2018-07-27	0.110000
51	2014-09-25	0.119000
52	2019-01-29	0.107000
53	2017-10-26	0.087000
54	2018-05-29	0.116000
55	2022-09-30	0.095000
56	2002-08-12	0.510000
57	2003-05-12	0.420000
58	2004-05-10	0.370000
59	2006-05-22	0.460000
60	2009-11-24	0.137000
61	2025-02-28	0.113000
62	2018-11-28	0.101000
63	2008-06-02	0.458000
64	2009-12-23	0.140000
65	2010-04-30	0.052000
66	2012-07-26	0.130000
67	2018-09-25	0.085000
68	2020-06-30	0.095000
69	2021-12-31	0.092000
70	2008-11-17	0.386000
71	2022-11-30	0.100000
72	2025-07-31	0.113000
73	2026-06-30	0.116000
74	2026-01-30	0.116000
75	2004-08-09	0.420000
76	2006-02-27	0.490000
77	2009-03-26	0.117000
78	2012-12-27	0.144000
79	2020-09-30	0.095000
80	2011-09-29	0.162000
81	2019-05-31	0.109000
82	2021-04-30	0.088000
83	2021-06-30	0.089000
84	2001-11-09	0.240000
85	2013-08-29	0.135000
86	2024-05-31	0.113000
87	2011-02-24	0.155000
88	2012-05-30	0.130000
89	2018-08-29	0.106000
90	2025-05-30	0.114000
91	2011-03-30	0.134000
92	2013-09-26	0.119000
93	2021-02-26	0.094000
94	2025-08-29	0.116000
95	2018-06-26	0.095000
96	2023-11-30	0.108000
97	2026-03-31	0.115000
98	2003-02-28	0.300000
99	2003-11-10	0.600000
100	2004-03-08	0.340000
101	2019-10-31	0.135000
102	2024-09-30	0.114000
103	2013-12-26	0.128000
104	2015-01-29	0.131000
105	2015-12-29	0.117000
106	2024-06-28	0.114000
107	2012-09-27	0.125000
108	2023-02-28	0.103000
109	2020-05-29	0.095000
110	2011-07-28	0.140000
111	2012-08-30	0.143000
112	2019-11-29	0.131000
113	2020-08-31	0.097000
114	2024-08-30	0.116000
115	2005-11-14	0.610000
116	2023-09-29	0.107000
117	2010-01-28	0.146000
118	2016-06-28	0.123000
119	2018-12-21	0.122000
120	2020-10-30	0.094000
121	2021-11-30	0.088000
122	2002-03-01	0.420000
123	2005-08-15	0.540000
124	2024-07-31	0.114000
125	2021-08-31	0.092000
126	2021-10-29	0.086000
127	2024-04-30	0.110000
128	2013-12-05	0.416000
129	2014-10-30	0.131000
130	2015-04-23	0.108000
131	2019-04-30	0.108000
132	2020-04-30	0.098000
133	2013-02-27	0.137000
134	2017-01-26	0.114000
135	2017-03-29	0.112000
136	2017-07-27	0.095000
137	2025-03-31	0.117000
138	2005-05-16	0.460000
139	2010-07-29	0.151000
140	2015-08-27	0.125000
141	2023-03-31	0.103000
142	2024-03-28	0.108000
143	2014-12-29	0.132000
144	2017-04-27	0.103000
145	2022-03-31	0.084000
146	2012-02-23	0.143000
147	2013-07-25	0.138000
148	2012-06-28	0.134000
149	2015-10-29	0.122000
150	2007-05-31	0.445000
151	2009-01-29	0.131000
152	2012-11-29	0.159000
153	2016-12-27	0.109000
154	2025-04-30	0.115000
155	2008-08-18	0.380000
156	2011-05-26	0.136000
157	2018-04-26	0.104000
158	2020-01-31	0.099000
159	2024-01-31	0.105000
160	2009-06-25	0.101000
161	2011-01-27	0.141000
162	2019-02-28	0.104000
163	2002-05-13	0.450000
164	2017-09-27	0.102000
165	2017-12-27	0.096000
166	2004-12-20	0.280000
167	2008-03-03	0.299000
168	2025-09-30	0.115000
169	2025-06-30	0.114000
170	2001-08-13	0.200000
171	2002-11-11	0.540000
172	2003-12-19	0.330000
173	2012-11-01	0.135000
174	2022-02-28	0.086000
175	2009-02-26	0.083000
176	2015-05-28	0.102000
177	2023-04-28	0.096000
178	2025-11-28	0.114000
179	2010-02-25	0.149000
180	2011-10-27	0.158000
181	2013-10-30	0.124000
182	2022-10-31	0.095000
183	2023-06-30	0.105000
184	2009-07-30	0.128000
185	2010-06-24	0.154000
186	2011-08-25	0.153000
187	2013-03-27	0.150000
188	2020-02-28	0.098000
189	2022-12-30	0.101000
190	2009-05-28	0.123000
191	2013-04-25	0.129000
192	2022-07-29	0.088000
193	2023-07-31	0.099000
194	2025-01-31	0.113000
195	2003-08-11	0.540000
196	2010-03-25	0.142000
197	2010-10-28	0.152000
198	2019-07-31	0.101000
199	2020-11-30	0.110000
200	2026-05-29	0.116000
201	2006-08-14	0.350000
202	2007-11-12	0.404000
203	2009-09-24	0.122000
204	2015-02-26	0.101000
205	2016-03-29	0.106000
206	2021-03-31	0.094000
207	2001-12-19	0.450000
208	2010-08-26	0.151000
209	2012-04-26	0.139000
210	2017-06-28	0.104000
211	2017-05-25	0.094000
212	2022-05-31	0.089000
213	2010-05-27	0.159000
214	2016-11-29	0.113000
215	2018-01-29	0.104000
216	2021-09-30	0.087000
217	2012-03-29	0.139000
218	2014-01-30	0.118000
219	2014-08-28	0.132000
220	2022-04-29	0.086000
221	2026-04-30	0.115000
222	2024-02-29	0.106000
223	2005-12-19	0.100000
224	2013-11-21	0.132000
225	2020-07-31	0.097000
226	2020-12-31	0.098000
227	2021-05-28	0.093000
228	2023-05-31	0.103000
229	2023-10-31	0.107000
230	2010-11-23	0.153000
231	2012-01-26	0.138000
232	2013-01-30	0.123000
233	2014-02-27	0.130000
234	2019-08-30	0.100000
235	2009-04-29	0.101000
236	2016-09-28	0.120000
237	2018-03-26	0.102000
238	2026-02-27	0.114000
239	2023-08-31	0.106000
240	2011-12-22	0.142000
241	2014-04-24	0.138000
242	2016-07-28	0.117000
243	2017-02-23	0.116000
244	2019-03-29	0.105000
245	2004-11-08	0.350000
246	2010-12-22	0.155000
247	2015-06-25	0.111000
248	2021-01-29	0.094000
249	2022-08-31	0.095000
250	2010-09-29	0.146000
251	2019-09-30	0.096000
252	2024-12-31	0.121000

4.9 KiB Raw Blame History

4.9 KiB

Raw Blame History