Winners

BT Group

(BTY)

was gaining 11% to $40.70 after the British telecom company reported full-year profits that came in ahead of expectations. The company, the parent of British Telecommunications, also said it reduced its debt load further than it originally expected.

Department store owner

Dillard's

(DDS) - Get Report

was gaining more than 10% to $30.10, a 52-week high, following the company's latest earnings report. Dillard's said it earned 68 cents in the first quarter, up from 34 cents in the year-ago period. Analysts were expecting earnings of 38 cents.

Instinet

(INET)

was climbing 11% to $7.80 on the heels of a report that the company is negotiating to acquire rival electronic trading platform

Island

.

The Wall Street Journal

reported that the companies could have a deal in place by the end of the month and put the value of the transaction at around $500 million.

Losers

NPS Pharmaceuticals

(NPSP)

was falling 27% to $22.76 after Merrill Lynch downgraded the company amid concerns relating to the launch of Preos, its treatment for osteoporosis.

Trinity Industries

(TRN) - Get Report

, a company involved in rail and barge transportation, was dropping 15% to $18.86 on word the company is being sued by a customer. Florida Marine Transporters alleges that Trinity sold it defective barges, according to a

Reuters

report.