Stephen Simpson, CFA, is a freelance financial writer and investor.I have worked for both sell-side and buy-side firms (equities and fixed income), with the largest percentage of my working time spent in med-tech. At this point I am now effectively in a "working retirement". I write because I find that the process helps me take better notes, be more disciplined about modeling, and come up with a more coherent investment view for my portfolio management needs. If I'm writing about a stock, it's generally because I'm interested in it as an investment prospect or I think there's an interesting story to tell. I don't share my models, so please don't ask. More of my writings can be found at my blog Kratisto Investing (kratistoinvesting.blogspot.com), or Twitter (@Kratisto_Invest).