Why? Because they're relentlessly trying to improve performance. It’s not enough to just monitor your personal finances or the market. You need to translate that knowledge into action and assess your results.
Remember those investing principles? There are two, in particular, that are directly related to this part of your process:
6th Principle of Investing Safely
Continually measure the performance of your plan or system; there is always something that can be improved.
9th Principle of Investing Safely
Improving your returns requires improving your system; tools alone will not improve your profits
It's with those two principles in mind that spend time each year examining the outlook, the opportunities and challenges that come with translating signals into trades, as well as refinements that can improve future performance.
And remember: All models are wrong, but some are useful. The objective here is to give readers readers an example of systematically using an investing process, including translating signals, executing trades, reviewing performance and adjusting methodologies. Providing this analysis (which mimics what I do personally) shows you the concept of a safe investing processes in action.