http://www.zerohedge.com/news/2014-09-24/risky-business-most-least-uncertain-industries-americaI think if you look at things like energy, banking, real estate, construction...any small business really in any industry...you have to factor in things like government regulation & taxation, Fed policy, cronyism/lobbyist/special interests, general economic environment etc the risk position will certainly change...but in general it is a decent first step...
But the clear reason this was posted is to show how precious metals is the lest risky, which is no surprise, but it does have a link to mining and the Fed and banking/trading...the latter one heavily gamed!