Weak investment activity is likely to restrain economic growth at 6.6 per cent for the quarter ended March 2017, says a Dun and Bradstreet report. Going forward, normal monsoon is expected to provide the requisite boost to demand, while transition to GST regime is likely to create some disruption and impact the short-term sales volume across businesses. “Weak investment activity as reflected in the subdued capital goods and infrastructure/construction sector output growth is likely to restrain growth,” the report said.