Facebook's Instagram Surprise Prompts More Doubts, Wall Street Says

Instagram office in New York.

Photographer: Jeenah Moon/Bloomberg
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Facebook Inc. investors woke up to another surprise this morning: Instagram co-founders Kevin Systrom and Mike Krieger are leaving the social-media giant amid disagreements with CEO Mark Zuckerberg, raising concerns over the future of the platform.

Shares fell as much as 2.6 percent at the open and are hovering around the lowest level since April, when the stock was rockedBloomberg Terminal by a data breach scandal. Meanwhile, investors in peer Snap Inc. are taking advantage of Facebook’s woes, sending shares up as much as 5.3 percent.