Nasdaq OMX May average daily volume up 13 percent

The Nasdaq OMX Group Inc. said Thursday its average daily matched volume for all U.S. Securities in May rose 13 percent to 2.2 billion shares compared with the same month a year ago.

The average daily matched trade count in U.S. equities was 9.5 million, an increase of 6 percent.

The Nasdaq matched share of U.S. equity volume in May 2009 was 19.8 percent, more than any other U.S. exchange for the 26th consecutive month.

Other results from the May report included:

_ Average daily matched share volume of U.S. exchange traded funds in May was 530 million shares, increasing 65 percent over the same period one year ago. The share in U.S. ETF funds during May was 22.4 percent, more than any other U.S. exchange.

_ The average daily matched volume of exchanges in U.S. equity options totaled 3.2 million contracts in May, an increase of 46 percent over the same period one year ago.

_ During May, 16.3 percent of Nasdaq's matched volume resulted from non-displayed orders, adding 7.2 billion shares of dark liquidity to the Nasdaq book.

Nasdaq OMX Group shares climbed 3 cents to $20.72. They've traded between $14.96 and $38.81 in the past 52 weeks.