U.S. stocks are on track in midday trading Friday for its best August performance in more than a decade. The trading volume is very light as we head into the Labor Day holiday weekend. U.S. stocks wobbled and turned lower as Britain's Prime Minister David Cameron said the U.K. was warned a terrorist attack on the country was 'highly likely.' The British government raised the terror threat level there to 'severe'. The move is based on intelligence from Iraq and Syria. The University of Michigan's final take on consumer sentiment rose in August from the month before to 82.5 from 81.8. The reading came in above forecasts. Telsa (TSLA) will partner with China Unicom to install 400 charging facilities across China. The Wall Street Journal reported Johnson and Johnson (JNJ) is looking for a buyer for its medical device-making unit worth as much as $2 billion. Big Lots (BIG) is down on flat Q2 earnings and weak outlook.