Is there a way of circumventing getting permission if I can find a newspaper or magazine article that references this other author's personal story about microcaps? I have yet to search, but it's very possible that this author mentioned his experience in an interview.
There is probably no way of circumventing getting permission.
Newspaper and magazine articles are copyrighted too, so, even if the personal story was quoted in an article, you would still need to get permission from these publishers to use what they published.
Other than facts (and ideas), which cannot be copyrighted, you should get permission to use another's material in your book. You can pull from a story or an article the facts, and you can use these facts as long as you do not present them in the same way. It will be the way the facts are
expressed - in an article, a book, a research study, a journal - that is copyright-protectable.
So, if you wish to use the author's personal story in your book, I recommend that you contact the author for permission to use the author's story in your book.
(all of the above, by the way, is assuming that what you want to use for your book is not in the public domain)
As to the Morningstar data and any other facts, statistics and data that you will be gathering from other sources, if you cannot verify the data and the facts and the statistics yourself (and I understand that this is often difficult or impossibe to do), you should credit these "unverified" facts and data and statistics to their sources. One reason to do this is that any errors (for example, in calculations) will then fall to your sources and not on you.
These are all very general writing guidelines, TalkinLaw, and a forum setting does not allow for much more than this. If you have concerns about what you can and cannot use in your book, it might be wise for you to sit down and go over your book outline and your chapter plans with a publishing law professional.
It is always wise to have a manuscript reviewed by a professional prior to publication. Getting advice while you are still working on completing your manuscript can be wise, as well.
Good luck.