Market Extra: Will the U.S. dollar remain the world’s dominant currency? Washington and Wall Street are worried about ‘de-dollarization’ threat.

A “de-dollarization” mania is gripping Washington and Wall Street.

Wall Street analysts, corporations, policy wonks and others are trying to ascertain whether there is any real threat to the U.S. dollar’s standing as the dominant global currency, along with how changes in the international monetary system might impact markets and the U.S. economy.

Interest…