(Kitco News) -- The Commodity Exchange will expand Trading at Settlement (TAS) to the second active month for gold and silver futures on CME Globex and the Comex trading floor, effective Sunday, Jan. 23, for trade dated the next day, says CME Group. Also, Comex will offer TAS in the first and second active months for copper futures on CME Globex only. The exchange will also implement intra-commodity calendar spreads between the first two active months in these contracts. Mike Daly, a gold and silver specialist with PFGBest, says spread traders have pushed for the TAS changes for some time. This “makes a market for spreaders” and offers some protection for them, he says. “It lends credence to spreading,” he adds. More participants are turning to spread trading due to the volatility in the metals markets, Daly says.