Story highlights Bernie Sanders laughed Sunday at the idea his candidacy has caused stocks to tumble

Sanders said he expects media organizations to endorse Hillary Clinton in the Democratic race

(CNN) Bernie Sanders laughed Sunday at the notion that his surging Democratic presidential candidacy has caused stocks to falter.

ABC's "This Week" host Martha Raddatz asked Sanders about Blackstone CEO Steve Schwarzman's argument that financial markets are unsettled because of Sanders, China's slowdown and global geopolitical risk.

As Sanders laughed, Raddatz pressed him on the impact a declining stock market has on retirement and pension funds.

"The reason that I am laughing is that I fully admit to having a big ego, like many other politicians," Sanders said. "But the idea that Bernie Sanders' candidacy, because that it has growing support all over this country, is unsettling world markets, is absolutely absurd."

Sanders said that he is, though, "getting the attention of Wall Street" with his calls to break up big banks and reinstitute a Depression-era law repealed under Bill Clinton that once separated commercial and investment banks.

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