Five major risks threaten the world economy. Three centre on the United States: renewed sharp increases in the current-account deficit leading to a crash of the dollar; a budget profile that is out of control; and an outbreak of trade protectionism. A fourth relates to China, which faces a possible hard landing from its recent overheating. The fifth is that oil prices could rise to $60-70 per barrel even without a major political or terrorist disruption, and much higher with one. Most of these risks reinforce each other. A further oil shock, a dollar collapse and a soaring American budget deficit would all generate much higher inflation and interest rates. A sharp dollar decline would increase the likelihood of further oil price rises. Larger budget deficits will produce larger American trade deficits, and thus more protectionism and dollar vulnerability. Realisation of any one of the five risks could substantially reduce world growth. If two or three, let alone all five, were to oc-cur in combination then they would radically reverse the global outlook.
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