NEW YORK (AP) _ Stocks that were moving substantially or trading heavily Monday on the New York Stock Exchange and Nasdaq Stock Market.

NYSE

Polo Ralph Lauren Corp., up $7.50 at $55.40

The clothing maker boosted its first-quarter forecast and better-than-expected sales of full-priced merchandise.

Landry's Restaurants Inc., up $2.26 at $29.17

The restaurant operator said in a regulatory filing that it is considering strategic alternatives for its Joe's Crab Shack chain.

Exco Resources Inc., up $1.85 at $12.10; Progress Energy Inc., down 23 cents at $44.02

Exco agreed to buy Progress Energy's Winchester Energy natural gas business for $1.2 billion in cash.

NASDAQ

Silicon Laboratories Inc., up $6.20 at $35.70

The integrated circuit manufacturer posted a steep drop in quarterly profit, but the results nonetheless beat Wall Street estimates.

Cardiome Pharma Corp., up $3.24 at $12.15

The drugmaker reported positive results in a midstage trial of its experimental treatment for irregular heart beats.

China BAK Battery Inc., down $2.12 at $4.67

The Chinese battery maker warned of lower third-quarter sales because of weak demand for steel- and aluminum-case batteries.