But Robinson, now chairman of the Casey Institute at the Center for Security Policy, argues that capital market restrictions wouldn't have the same ill effects as trade sanctions.

CENTERFORSECURITYPOLICY: Center For Security Policy

More than 80 other patients are said to have undergone MRI scans in Campinas on the same day but so far suffered no ill-effects.

BBC: Brazil health authorities investigate MRI scan deaths

But if we naively assume that U.S. firms will be able to export with no ill global effects, we then have to consider the view among investors when it comes to growing earnings within those same companies.

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