https://phys.org/news/2018-08-apple-wall-street-trillion-stock.html > That's the "$1,000,000,000,000 Question" stock traders and 401(k) investors are pondering after the iPhone maker on Thursday became the first U.S. publicly traded stock to surpass a market value of $1 trillion. > Finding companies with the clout, the sales, the killer product and the dominance to grow into a stock with a thirteen-digit market capitalization is all about focusing on the giants, the biggest companies that populate the large-company Standard & Poor's 500 stock index.