Based on information received from members and member organizations, short interest increased to 16,009,687,994 from 14,956,961,052 on February 29, 2008.

The short interest on March 14 was equal to 4.2 percent of the total shares outstanding.

The short interest in warrants as of March 14 amounted to 96,064 warrants, compared to 362,903 warrants the previous period.

As of the settlement date, there were 3,639 stocks and 9 warrants available for trading. Of these, 3,144 issues had either a short position of at least 5,000 shares or a change of 2,000 shares since the last monthly report.

A short sale is any sale of a security that the seller does not own or any sale that is completed by the delivery of a borrowed security.