Dow has lagged the S&P 500 in the past year, but has beat the S&P over the last 40 years: Jeremy Siegel

The Dow has kicked out Pfizer, Exxon and Raytheon. Jeremy Siegel, University of Pennsylvania The Wharton School professor of finance, joins 'Squawk Box' to discuss what led to move, the history of the Dow and the new replacements Salesforce.com, Amgen, and Honeywell.
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Tue, Aug 25 20207:22 AM EDT