As Zoom's usage and stock have soared amid the coronavirus pandemic, two of its biggest venture backers have locked in billion-dollar gains (ZM)

· Zoom's stock price has soared since its initial public offering last April, particularly so in recent weeks as usage of its video-conferencing service has spiked amid the coronavirus pandemic.
· Sequoia Capital and Emergence Partners, two of Zoom's venture backers before it went public, have seen huge returns from their...