The Dollar Index rose 1.2 percent during the week, triggering plunges in oil, gold and US Treasuries.
The Australian dollar dropped below parity with the greenback.
The pound declined 1.5 percent this week to US$1.5339, the biggest drop since the period ended on Feb. 22. Sterling weakened 0.3 percent to ￡0.8453 pence per euro.
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