(Bloomberg News) Two U.S. lawmakers will introduce measures to impose a transaction tax on financial firms that resembles a proposal released by the European Union.

Senator Tom Harkin, an Iowa Democrat, and Representative Peter DeFazio, an Oregon Democrat, will introduce the bills tomorrow in their respective chambers. The bills will give the United States an increased role in the international debate over a transaction tax, which is likely to be discussed at the Group of 20 summit this week in Cannes, France.

"It's a significant way to raise some needed revenue," Harkin said in an interview today in Washington. "Quite frankly, I bet nobody would even feel it."

The European Union in September proposed a financial transaction tax that would take effect in 2014 and raise about $57 billion euros ($78 billion) a year. Germany and France have led a push for global implementation.

The bills are unlikely to become law: Republicans, who have opposed financial-transaction taxes in the past, control a majority in the House. President Barack Obama's administration has also voiced concerns over the proposal and declined to give a direct endorsement in advance of the G-20 summit that opens Nov. 3.

U.S. exchange operators fell the most since August on the news that the lawmakers would propose the tax.

Stocks Drop

NYSE Euronext declined 6.8 percent, the most since Aug. 18, to $24.76, while Nasdaq OMX Group Inc. fell 2.8 percent to $24.36. CME Group Inc. slumped 8.6 percent to $251.88 in the biggest retreat since Aug. 10.

Harkin and DeFazio introduced similar proposals in recent years that fell short; the lawmakers expressed hope that the European proposals may increase support in the U.S. Congress.

Harkin and DeFazio are proposing a lower rate for the United States. While the EU proposal would apply a tax of 0.1 percent on trades of stocks and bonds, the U.S. tax would be "about three basis points" or 0.03 percent, Harkin said.
"We're simplifying it, looking at a lower rate and actually substantially mirroring the proposal in Europe," DeFazio said in an interview.

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