I studied investment at the undergraduate stage, and there was also investment in the reference books of professional courses when I took the postgraduate entrance examination. I can definitely answer you, yes, learning to invest is very brain-consuming.

Investment science, as its name implies, is to learn the principle of investment or something. I didn't invest in this direction, so this course was arranged in the last semester of our junior year. If it is the investment direction, it may be earlier. Because learning this course requires some financial knowledge, you should be familiar with at least the basic financial concepts and models. It is very difficult to learn this course if you want to know what stocks and bonds are for a while. Students in the same school this year, including undergraduate non-financial majors, have never studied this course, so their professional grades will be slightly worse. In our chat, they also told me that they think investment is the most difficult course in the professional course.

For people with a foundation, the main difficulty of this course is the understanding of the model. CAPM, APT and other models are easy to remember. However, although the expression of this model is simple, this model is not casually thought out. You must understand the assumptions of each model and the meaning of each parameter in order to use it better.

When it comes to investment science, you must read "Investment Science" written by Bodie, which is too classic. I use this book for both undergraduate study and postgraduate review. This book is very thick and difficult to read, and it is even more difficult to do some after-school questions.

However, although it takes brains to learn investment science, you can still learn it well as long as you lay a good foundation and think more yourself.

I hope my answer is helpful to you.