June was a market bottom, the second half of 2022 will be strong, says Wharton's Jeremy Siegel

Jeremy Siegel, professor of finance at the University of Pennyslvania's Wharton School of Business, joins CNBC's 'Squawk Box' to explain why he thinks June marked a market bottom, and why the Federal Reserve could be "sorry" for over-tightening if the central bank moves interest rates too high.