What smart people are saying about oil's latest spike to nearly $120 a barrel

Nobel economist Paul Krugman warned a prolonged oil shock could trigger stagflation.

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• Energy gurus say Thursday's spike in oil and gas prices may be just a taste of what's coming.
• They warned of roiling markets, shipping chaos, rising food prices, and severe economic pain.
• Brent crude hit a nearly 4-year high after Iran attacked the world's largest LNG plant in Qatar.

The historic spike in oil and gas prices on Thursday could herald...