I am a huge fan of behavioural finance too! Thinking fast and slow by Daniel Kahneman led me down a rabbit hole of the topic. I think a lot of people don’t enjoy the passive approach of investing because it’s not glamorous but for me I find that index investing is the way to go . After reading John Bogle I find that my mind finds comfort in keeping things simple - “don’t look for the needle buy the haystack”
@joeyhirendernath agree with you here! I use index investing for large majority of family investments then I run a stock portfolio outside of that with a smaller amount.
It's only been a few years for me, but I've definitely underperformed the major indexes. Hoping that changes as I learn and build out a process that works for me, but if not I know that my ego isn't big enough that I won't someday cash it all out and go 80/20 index!
Did the study mention any behaviors that lead to the average investors underperformance? (Such has trading too much, or being too overweight one sector, etc)
Indeed, lots of evidence that retail investors should index in low-cost ETFs and not mess with it
Behavioral finance identifies the specific behaviors that drive large losses based on deep econ theory
I read this paper as a PhD student (https://onlinelibrary.wiley.com/doi/full/10.1111/0022-1082.00072) and decided after being a professor for a while to go out and build analytics that identify and quantify biases so investors can improve tactically and not let emotions destroy their wealth