"If you're not doing anything wrong, you have nothing to be worried about, " said Joseph Clarke, 32, a London banker.

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You're really worried about them and, you know, is they're going to be OK in what they are doing and it's just - it's hard.

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"With anyone else, you'd be worried, " says analyst James Sullivan of the Green Street Advisors research firm, who generally is skeptical about REITs doing construction.

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McNamee thinks Google should be most worried about how, as the world moves increasingly to getting their web content from a mobile device, they are doing index search far less than they used to.

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