I trade stocks long only and for me, I use certain fundamentals as a check to the companies 'safety / risk', ie do I feel the business is legitimate and secure.
So I look at who the directors are, I look at which nationalities they are, this may appear to be racially biased but for me it is. I look at their qualifications ie zero degrees or are accountants running an engineering business, I'm interested to know which countries they operate in (sovereign risk). I'm also interested in how much debt they have relative to income, and there are a number of other checks I do.
Now I'll still sometimes trade a very high risk company, but I'll be trading with a keener eye on exiting quicker on pullbacks.