I have been around a long time and Wall Street has changed a lot.
I agree with Warren to keep it simple and not use higher mathematics in your analysis.
We do not spend a great deal of time talking to management.
Yes, Warren has done very well.
Sell is tough. It's the worst, it's the most difficult thing of all.
When it comes to investing, my suggestion is to first understand your strengths and weaknesses, and then devise a simple strategy so that you can sleep at night!