One of Wall Street's best stock pickers shares his secrets for crushing the market

Alex Umansky, who manages five mutual-fund portfolios for Baron Funds, saw his $199 million Fifth Avenue Growth Fund smash benchmarks in 2017 with a 40.6% return. That same fund has also destroyed the Russell 1000 Growth and S&P 500 index benchmarks since 2011. In a wide-ranging discussion, Umansky shared some of his investing secrets, including the rationale for his biggest stock picks, his unique approach to diversification, and how he views market turbulence. Alex Umansky doesn't...