In the final part of this 4 part series we discuss equity risk measures, asset risk and portfolio level risk. Risk measures, as with all financial analysis are tools, not predictors. They can help the investor to assess and judge risk levels as compared to expected (judged) potential reward. They are not hard and fast rules, they are not perfect, they are not end all be all omniscient god-beings. 

Investing involves risk, understanding how to minimize or mitigate risk, and specifically, how to assess what the risk of a particular investment may be - how to roughly measure such - and therefore how to make better informed judgements.