Apple hits $2 trn market valuation, but the next trillion won't come easy

Apple Inc. has done it again. On Wednesday, just two years after becoming the first U.S. company to boast a trillion-dollar market valuation, it became the first to top $2 trillion. Getting to the next trillion may not be such a breeze. 

With its shares up roughly 60 per cent this year, Apple is among the Big Tech winners that have benefited from a “safety premium.” Investors have piled in to the iPhone maker’s shares as well as those of other technology darlings — including Amazon.com Inc., Facebook Inc. and Google parent Alphabet Inc. —  betting their business models, robust balance