Here's why Wharton's Jeremy Siegel says 'this rally has further to go'

Jeremy Siegel
David Orrell | CNBC

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Wharton professor Jeremy Siegel said Tuesday that the stock market rally isn't over thanks to the massive support from the Federal Reserve.

"I think this rally has further to go. It has all those doubters there but it's the liquidity that the Fed provided that I think is the prime determinant," Siegel said on CNBC's "Closing Bell."