Daniel Pavilonis, senior commodities broker with RJO Futures, said he sees further weakness for gold.

FORBES: METALS OUTLOOK: Europe, Global Economic Growth May Dominate Headlines Again Next Week

Bob Haberkorn, senior commodities broker, RJO Futures, said the short-term trend in gold is down, although longer term he still likes gold.

FORBES: METALS OUTLOOK: Gold To Watch The Dollar, Bernanke

An agreement would be expected to underpin the euro, thereby helping gold, said Gero and Daniel Pavilonis, senior commodities broker with RJO Futures.

FORBES: Gold Market Expected To Focus On Greece, Fiscal Cliff, Fed Speakers Next Week

"I'm sure there are a lot of margin calls being triggered and positions being blown, " said Bob Haberkorn, senior commodities broker with RJO Futures.

WSJ: Gold Plummets to Two-Year Low

"There's a tug-of-war going on as to which one is going to be the ultimate benchmark, " said Michael Sabo, senior commodities broker at RJO Futures.

WSJ: Brent Benchmark Is Skewed by Crude Measure

Detectives named the man thought to be with Megan as Jeremy Forrest, 30, from Ringmer, near Lewes who was driving a Ford Fiesta, registration GJ08 RJO.

BBC: Megan Stammers

Some of the weakness was tied to several analysts downgrading expectations of forthcoming U.S. fourth-quarter gross domestic product after the release of monthly trade data, said Dan Pavilonis, senior commodities broker with RJO Futures.

FORBES: METALS OUTLOOK: Uncertainty Still A Hallmark For Gold; Market May Hold Range Bound