There's a large barrier to entry in online travel for most companies due to the cost of global hotel supply. Nowak estimates Booking Holdings and Expedia spend roughly $620 million each on their hotel supply annually, but that number pales in comparison to the $6.4 billion Amazon is spending on streaming video content in 2018. If Amazon is able to build a successful online travel business, Morgan Stanley analyst Brian Nowak says it could provide a huge boost to the company's bottom line. "Our sensitivity table shows that if AMZN could build an online hotel business even 50 percent the size of EXPE's hotel business ... it would add roughly $600 million to operating profit," Nowak says. He says a more aggressive approach and/or a more efficient ad spend could bump that operating profit as high as $1.5 billion annually. Get the full story at U.S. News Read also "Amazon could disrupt online travel industry next, Morgan Stanley says"