Apple Inc. has founded a new club. Already the biggest company in the world by market capitalization, on Tuesday the company topped $700 billion, the highest valuation on record. The tech behemoth is on a tear with a strong lineup of iPhones, iPads, Apple Pay and an upcoming smart watch. Its shares are up 47 percent this year alone, riding an incredible six-year rally. For context , Apple’s market cap currently exceeds the gross domestic product of all but the 19 richest countries in the world.