Meet the world's 10 richest women who are jointly worth about $500 billion - almost as much as ExxonMobil

The world's 10 richest women, including Walmart heiress Alice Walton and Fidelity CEO Abigail Johnson, are collectively worth over $508 billion on the Bloomberg Billionaires Index.

Despite four of the wealthiest women experiencing declines in their individual fortunes this year, the total net worth of the group has increased by $37 billion.

Read at Business Insider