Shares are soaring and business is booming. What's next for the stock? Looking beyond revenue growth, the company's earnings momentum is even more impressive. Second-quarter earnings per share came in at $7.19, up 47% year over year. This outsized growth is due to massive operating margin expansion. Second-quarter operating margin was 34.1%, up from 27.2% in the year-ago quarter. Netflix (NFLX -3.38%) stock has crushed the market this year. The streaming service specialist's shares have climbed more than 38 ...