U.S. stocks retreat, dollar slumps as Trump optimism wanes

By Gertrude Chavez-Dreyfuss NEW YORK (Reuters) - Wall Street stocks fell and the U.S. dollar dropped to a five-week low on Thursday after President-elect Donald Trump, in his eagerly-awaited news briefing the previous day, failed to provide details on fiscal policies that were expected to bolster the economy. Instead, Trump remarked on a broad range of topics such as the Mexican wall, allegations of Russian hacking and his business interests but left out what investors wanted to hear about - fis