Amazon added the equivalent of Walmart's market cap in 2018
US e-commerce giant Amazon has added $260 billion to its market value in the last 6 months, which is equivalent to retail giant Walmart's total market capitalisation. The world's most valuable company, Apple, has a market cap of $917 billion, about 10% more than Amazon. Notably, Apple's value was 50% higher than Amazon at the beginning of this year.