Hedge fund manager Jeff Gramm pops over to Times Square to discuss his new book, "Dear Chairman," which chronicles eight decades of pushy investing from Benjamin Graham and Warren Buffett to Carl Icahn and Dan Loeb, and what this history means for markets now and in the future.

The Exchange is a regular conversation with influential and interesting movers and shakers in business and markets. From Reuters’ global headquarters in New York’s Times Square, editors debate and discusses trends in finance, business and economics with those who shape them, from central bankers and corporate executives to authors and film directors.

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