For some time now the conventional investment wisdom has been that the global economy may be at risk of a slowdown, posing a threat to companies dependent on international markets. The major exception, this thinking went, was big technology companies, which have so much going for them that they were immune to any minor bumps in worldwide growth.But now there’s reason to believe both sides of that narrative have changed and that there’s cause for optimism for global growth but pessimism for Silicon Valley. If that’s right, it will mean some stock-market darlings are about to fall from favor while certain laggards suddenly outperform.

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