In order to have a corresponding ounce-to-ounce spread trade in the futures market, a trader who is looking for the spread to narrow would buy two 50-ounce platinum futures contracts and simultaneously sell one 100-ounce gold futures contract.

FORBES: FOCUS: Platinum-Gold Spread Narrows, But Gold Remains At Premium

Selerity alerted clients, who were able to buy gasoline futures contracts before the news spread widely and caused prices to soar, says Mr. Terpstra.

WSJ: In the Wired World, Feeds Drive Trading

Yet, even after the central banks' announcement, dealers cited by TradeTheNews.com said that some interest rate spreads were still high, with the TED spread (which is price difference between three-month futures contracts for U.S. Treasuries and three-month contracts for Eurodollars) still above 30 basis points.

FORBES: Market Scan