As active asset managers across the globe struggle with outflows, a little-known Cologne boutique is bucking the trend. Flossbach von Storch AG, started more than two decades ago by two former Goldman Sachs Group Inc. private bankers, has more than doubled assets over the past four years by offering essentially one strategy -- multi-asset funds that invest across markets such as bonds, equities and precious metals. Last year, customers added 1.7 billion euros ($1.9 billion) in net new money to the company’s open-ended retail funds, with the flagship offering attracting cash every month. "If you want to sustain and ... (full story)