David Tepper: Closed-end funds remain an investment bargain

David Tepper of Tepper Capital Management in San Francisco explains why he uses closed-end funds almost exclusively in his client portfolios, noting that in today's market conditions there are plenty of opportunities to build a well-diversified portfolio at a discount, and adding that even long-term closed-end fund investors need to be prepared to take advantage of times when discounts narrow suddenly, creating short-term chances for bigger-than-expected gains.