Professor Robert C. Merton is a Nobel Prize winner in economics that specializes in market analysis and modeling. It's useful to differentiate between people like this who have developed methodologies based on analyzing large quantities of data, he says. "This does provide us with a good litmus test for judging whether an idea in personal finance has much credence" Mike writes: 'Growth stocks are not stocks but bundles of options and thus key determinant of value is volatility'