Sector roundup: Aluminum, heavy machinery

Among the sector activity stories for Monday, March 30, from AP Financial News:

WASHINGTON (AP) — Shares of Aluminum Corp. of China Ltd. and other U.S. metal makers tumbled Monday after the company warned of a first-quarter loss and the Obama administration mulled the viability of a controlled bankruptcy of automakers General Motors and Chrysler.
NEW YORK (AP) — Stocks of heavy machinery manufacturers tumbled Monday as crane maker Manitowoc Co. retracted its full-year guidance and the broader market fell on fresh challenges for General Motors Corp. and Chrysler LLC.
NEW YORK (AP) — Shares of freight railroad companies fell Monday as the broader market stumbled and a Goldman Sachs analyst lowered earnings estimates of railroads due to a slump in shipment volumes.