BATS Global Markets said that its average daily matched volume was 660.2 million shares in May, down from 693.5 million shares in April, but up from the 651.8 million share level in March.
It is also down from one year ago, when 830.6 million shares changed hands. Compared to a year ago, volume is down 20.5 percent.
In May BATS matched market share of its two national stock exchanges was 10.4 percent. That is down from 10.9 percent in April.
A year ago, BATS’ two exchanges had an 11.7 percent share of trading in equities in the United States.
BATS is typically the first exchange operator to report its monthly market share and volume figures and as such can be used as an early indication of overall equities market volume.
In equities options, BATS Options saw its matched market share fall to 3.8 in May, down from 4.0 in April and unchanged from 3.8 percent in March. This is up 21 percent from the 3.0 percent seen one year ago. Average daily matched volume rose in May to 658,045 contracts compared to 656,824 contracts in April and compared to 574,846 in March.
One year ago options volume was 501,649 contracts.
The BATS 1000 Index, a broad based U.S. equities market benchmark, ended the month up 257.1 points, or 1.4 percent higher, closing at 18,305.50 vs 18,048.40 In April.
BATS operates two stock exchanges in the U.S., the BATS BZX Exchange and BATS BYX Exchange; as well as BATS Options, a U.S. equity options market; and BATS Europe and Chi-X Europe.
