The American exchange offers options both in and out of the money.

Short positions on the American exchange also declined a month ago, down 1.8 percent.

Such futures now trade on two American exchanges, but have not yet taken off.

On the American exchange, short interest advanced 4.5 percent in the same period.

When he arrived, the American exchange was struggling with problems that went far beyond a poor image.

A spokeswoman for the American exchange also said its plans had not changed.

On the American exchange, the percentage increase was much greater, with short interest up 9.8 percent, to 121.07 million shares.

On the American exchange, the rise was 12.6 percent, to 136.385 million shares, for the same period.

On the American exchange, the decline in short sales was a bit larger.

Moreover, the project comes at an extremely difficult time for the American exchange.