A stock picker who's dominating 92% of his peers breaks down his market-beating strategy — and revea

The AB Concentrated Growth Fund, overseen by Jim Tierney, has outperformed its Lipper category on an annualized basis during his five years as its chief investment officer. His concentrated strategy requires that only about 15 to 20 stocks be in the portfolio at any given time. In an interview with Business Insider, he detailed the numerical and subjective criteria that go into his stock-picking process and the reasons he's betting on five companies to withstand a slowdown in earnings...