The Power of Concentrated Investing and Long-Term Gains

Bloomberg Opinion columnist Barry Ritholtz speaks with Markel Corp. co-chief executive officer Thomas S. Gayner. Gayner oversees investing activities for the company — which boasts a capital portfolio of $27 billion — as well as the Markel Ventures companies. He also serves on the boards of Colfax Corp., Graham Holdings Co., Cable One Inc. and Davis Funds, as well as that of Markel.

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