Industrial production in April grew at the fastest monthly rate in more than three years, on the back of broad-based gains in the manufacturing sector. The Federal Reserve said Tuesday that industrial production grew 1% in April, topping the MarketWatch-compiled economist consensus for 0.5% growth. This is the fastest pace of growth since February 2014. March’s increase was revised down slightly to a 0.4% rise from an initially reported 0.5% gain. But industrial output has been up for three straight months.