Laetitia Laurent, a South Florida interior designer, has long had her heart set on a Parisian pied-à-terre. This summer, with the dollar soaring and Parisian real-estate prices holding steady, she took the leap. “I had been looking for a place for a long time,” says Ms. Laurent, who plans to use the apartment for work when she visits Paris to source designs for American clients, and for vacations with her husband and three young children. What helped propel her from just looking to outright buying was the strength of the U.S. dollar—“a huge factor” in the purchase, she says—15% over the past year, hovering at or near parity since mid-July. The dollar is rising so much, and so quickly, that Ms. Laurent estimates she saved around $80,000 between the time she first saw the apartment in early 2022 and when she closed in July.

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