Traders work on the floor of the New York Stock Exchange (NYSE). Photograph: Angela Weiss/AFP European shares edged higher in a choppy day of trading on Tuesday, as investors shifted their focus to quarterly earnings reports from companies such as UBS, BNP Paribas and Ferrari among others, while caution prevailed about potential US tariffs. The Stoxx index had posted its steepest daily decline so far this year on Monday after US president Donald Trump said he would announce tariffs on top trade partners and impose surcharges on imports from the EU soon. Trump then agreed to a 30-day pause before…