Southwest, Wal-Mart, Tyson Foods, LDK Solar among companies making big stock market moves

Southwest, Wal-Mart, Tyson among big market movers

NEW YORK — Stocks that moved substantially or traded heavily Monday on the New York Stock Exchange and Nasdaq Stock Market:

NYSE

Southwest Airlines Co., up $1.07 at $13.35

The discount carrier agreed to buy rival airline AirTran Holdings Inc. for $1.42 billion, bringing Southwest to 37 new cities.

Wal-Mart Stores Inc., down 60 cents at $53.48

In a bid for international growth, the world’s largest retailer offered to buy South African chain Massmart Holdings Ltd. for $4.25 billion.

Tyson Foods Inc., down 43 cents at $15.22

China, the largest importer of U.S. chicken last year, is planning a big tariff on U.S. chicken imports, which could hurt the poultry producer.

Alberto Culver Co., up $6.16 at $37.64

Netherlands consumer goods giant Unilever NV agreed to buy the U.S. beauty products maker for $3.7 billion.

LDK Solar Co., up $1.60 at $10.45

The solar energy company signed a financing agreement with China Development Bank Corp. worth up to $8.9 billion over five years.

BPZ Resources Inc., down 47 cents at $3.70

An equities analyst cut his rating on the energy company because of problems with an oil well off the coast of Peru.

NASDAQ

Seattle Genetics Inc., up $2.14 at $14.30

The drug developer said its potential treatment for Hodgkin’s lymphoma met key goals in a pivotal study.

CSG Systems International Inc., down $2.28 at $18.37

An analyst downgraded the software provider, saying a recent acquisition won’t expand business outside of the communications sector.