NYC Marathon Reviewing Race Security After Boston

May 3 (Bloomberg) -- Mary Wittenberg, chief executive officer of New York Road Runners, which stages the New York City Marathon, talks about the race's security and safety after last month's attack on the Boston Marathon. She speaks with Erik Schatzker on Bloomberg Television's "Market Makers." Greenhill & Co.'s Scott Bok also speaks. (Source: Bloomberg)
ETFs Display Best and Worst of Markets in Selloff
34:27 - Bloomberg's Eric Balchunas explains the wild ride for ETFs during Monday's stock market selloff and why it has drawn the attention of market regulators. He speaks on "Market Makers." (Source: Bloomberg)
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