By Grant Smith, Karin Strohecker and Dhara Ranasinghe

LONDON (Reuters) -The U.S. dollar, long renowned for its strength, has been weakened by President Donald Trump’s stiff tariffs, his attacks on the Federal Reserve and his distancing from allies and global institutions.

The dollar still makes up for the bulk of central bank foreign exchange reserves, according to latest IMF data. It’s not expected to lose that position anytime soon given the United States’ dominance in the global economy, trade and debt markets.

Still, the dollar index, which measures the value of the greenback against a basket of major world currencies suffered its worst first half of the year since the early 1970s. And shifts in U.S. policy mean the dollar’s standing is under scrutiny, with gold as well as the likes

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