There are subtle signs that the world is losing trust in the United States dollar. It’s still the lingua franca of global transactions but now makes up 58% of the world’s currency reserves, down from 72% in 2001. That’s not a fire sale, but it reflects worrisome barometers, like the crash of domestic savings, ballooning federal debt and whiplash fiscal policy shifts every four or eight years. S&P Global still gives U.S. credit worthiness an AA+ rating — but that comes with a warning that it could change if deficit spending is not held in check. All of which also impacts the dollar’s value on the foreign exchange market. Should America fight to keep the greenback strong or let market forces dictate its value?

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The dollar’s historical reliability — even after it was decoupled from

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