Wal-Mart, Wendy's among big market movers

TJX Cos., down $1.31 at $30.83

Investors expected more from the discount retailer, after first-quarter revenue missed Wall Street expectations.

Liz Claiborne Inc., up 31 cents at $18.68

Adjusted profit and sales came in better than expected, as a 16 percent rise in international sales offset flat domestic sales.

Fluor Corp., up $23.46 at $189.82

Quarterly profit soared 63 percent, as the engineering and construction contractor won a number of new projects.

NASDAQ

Iomai Corp., up $3.41 at $6.33

Vaccine developer Intercell AG is buying the biotechnology company for $189 million, or $6.60 per share, to expand its late-stage pipeline.