NEW YORK (Reuters) - U.S. stocks were flat on Friday after President Donald Trump instructed aides to proceed with tariffs on about $200 billion of Chinese products, while financial shares gained with bond yields. A source familiar with the situation confirmed reports initially carried by both Bloomberg and Fox News on the moves by the White House. They came despite Treasury Secretary Steven Mnuchin’s attempts to restart talks with Beijing. The S&P financial index .SPSY was up 0.6 percent. U.S. Treasury yields rose above 3 percent earlier in the day but were last off those levels. “There are a lot of headlines that have come out here, people have been pretty active all week, and it’s Friday afternoon.