German industrial output in August plunged at its steepest rate since the height of the financial crisis, data showed on Tuesday, while the International Monetary Fund cut its German growth forecast. Combined with Monday’s tumbling industrial orders, the news raised further concern that Europe’s largest economy is running out of steam. The 4.0 percent month-on-month drop in industrial production missed a consensus forecast in a Reuters poll for a 1.5 percent decrease and even the lowest forecast for a 3.0 percent fall.