NYSE Euronext said the volume of trading in stocks it handles in the United States fell 10.6% in December.

Trading volume gained in European stocks as well as futures and options contracts, the operator of the New York Stock Exchange said.

In Europe, NYSE Euronext handled 1.3 million transactions in December 2011. That was up 9% against December 2010, but down 19.9% from November 2011 levels.

Also in December, the exchange operator handled:

• 7.5 million derivatives contracts, globally. That was up 11.8%, compared to a year earlier but 10.1 percent down from November.

• 3.4 million derivatives contracts, in Europe. That was up 4.2% percent compared to December 2010, but down 13.4% from November 2011.

• 8.3% fewer derivatives contracts, when excluding results of Bclear, NYSE Liffe's trade administration and clearing service for over-the-counter products. Volume in European derivatives products decreased 8.3% compared to December 2010 and decreased 29.5% from November 2011 when Bclear is not counted.

• 3.9 million equity options contracts in the United States. NYSE Arca and NYSE Amex volume was up 17.1% from a year earlier, but down 7.3% from November.

• 89,600 futues contracts at NYSE Liffe U.S. This was up from 13,000 contracts in December 2010 and up from 88,500 contracts in November 2011.

Tom Steinert-Threlkeld writes for Securities Technology Monitor.