Graham Witcomb is a senior analyst at Intelligent Investor owned by InvestSMART Group. Graham has a degree in psychology from the University of Sydney and is a Chartered Financial Analyst charterholder. He previously worked for one of the world's most successful professional gamblers, and joined InvestSMART in 2013 where he focuses on healthcare, insurance and transport infrastructure. This article contains general investment advice only (under AFSL 226435). To unlock Intelligent Investor stock research and buy recommendations, take out a 15-day free membership.