So, when the stock market crashes... you have never heard many great fund advisors say, it’s a buying opportunity? You either only play OTC’s or you haven’t invested long. It’s always good to look at charts from where a stock once was to determine what a great entry point is when it retraces. There might not be books published on buying stock as it goes down and down, but if it’s a good stock and it gets its ass kicked (oversold),
It creates a buyers opportunity for getting in something good before it heads back up. I’m sure you can google stock market crash creates buying opportunities.
Good luck here!