TribLIVE's Daily and Weekly email newsletters deliver the news you want and information you need, right to your inbox. I’ve never seen the Old Faithful Geyser in Yellowstone National Park. But I’m grateful to it. Years ago, I named one of my stock screens (computerized stock-picking aids) after it. And it has indeed served me faithfully. I use the screen to help pick stocks for clients, and once a year I write a column featuring some stocks it highlights. On the previous 18 columns, the average 12-month gain has been 21.7%. That compares well with 8% for the Standard & Poor’s 500 Index over the same periods.