Warren Buffett with a twist: A fund manager beating 99% of his peers breaks down his unique approach to stock picking — and shares the 'worst thing you can say' at his firm

· Mike Tian says an adaptation of Warren Buffett's investing philosophy helped make the WCM Focused Emerging Markets Investor Fund the best emerging-markets stock fund of the last five years.
· Buffett has long prized companies with major competitive advantages, or "moats." Tian says he and his co-managers only invest in...