From CA FTB Publication 1031, under Section I, "Income taxable by California", on pages 6-9:
"The gain or loss from the sale of stocks or bonds has a source where you are a resident at the time of the sale."
"Interest and dividends generally have a source where you are a resident. Exception: Interest and dividends have a source in California if the account or security is used in a trade or business or pledged as security for a loan, the proceeds of which are used in a trade or business in California."
https://www.ftb.ca.gov/forms/2023/2023-1031-publication.pdf
So, unless your interest and/or dividend income falls under the exception, none of your capital gain or dividend income is California-sourced or taxable by California.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
