In April, US factories slowed their activity for the second month in a row amid rising raw material prices due to the application of duties on imports of steel and aluminum, Reuters reported. According to the survey of the Institute for Supply Management, along with import duties, bottleneck in the supply chain is also a shortage of skilled workers. The activity index of ISM factories in April fell to 57.3 points from 59.3 points a month earlier. The price index rose by 1.2% to the highest since April 2011 at 79.3 points. At the same time, production in the US is supported by a stable global economic growth and a weak dollar, which strengthens the competitiveness of American goods in the world market.