(Reuters) - The Dow and the S&P 500 fell after China’s retaliatory action against U.S. tariffs rekindled concerns that the world’s two biggest economies were headed toward a trade war, with losses limited by gains in energy shares. U.S. President Donald Trump said last week he was pushing ahead with hefty tariffs on $50 billion of Chinese imports, prompting a swift response from Beijing, which said it would slap duties on several American commodities. Boeing, the single largest U.S.
