SHANGHAI, Nov 11, 2011 (Dow Jones) -- The Shanghai Futures Exchange said Friday it will adjust limits for margin trading and price volatility in copper and aluminum traded on the bourse starting Nov. 16.
The minimum margin for trading copper contracts will be raised to 11% from 10% of contract value, starting Nov. 16, the SHFE said in a statement on its website.
Aluminum's minimum trading margin will be hiked to 7% from 6%, the exchange said.
The upper and lower trading limits for aluminum contracts will be expanded to 5% of previous settlement prices from 4% starting Nov. 16, it said.
The SHFE currently trades copper, aluminum, lead, zinc, gold, fuel oil, natural rubber, rebar, and wire.