NYSE

General Motors Corp., down 84 cents at $10.26

Credit rating agency Moody's downgraded the automaker's credit ratings, citing its challenges "in reestablishing a competitive position" in the U.S. market.

Deere & Co., down $2.25 at $67.10

While high crop prices spurred stronger sales of farm equipment, lower consumer, construction and forestry equipment revenue hurt quarterly profit.

Macy's Inc., up 39 cents at $20.66

Shares were up, even though the department store operator predicted full-year earnings below analyst estimates and reported lower quarterly revenue on slower consumer spending.

Dr Pepper Snapple Group Inc., up $1.13 at $22.79

The soft drink maker forecast better-than-expected 2008 profit, though second-quarter income fell on costs related to its recent spin-off from Cadbury Schweppes PLC.

Liz Claiborne Inc., down $1.73 at $13.18

The apparel maker trimmed its full-year profit outlook amid a slowdown in discretionary spending and posted a second-quarter loss from a year-ago profit.

NASDAQ

Applied Materials Inc., up 86 cents at $19.33

Quarterly profit dropped 65 percent on tough industry conditions, but the chip equipment maker thinks the period marked a bottom for orders and revenue.

Canadian Solar Inc., down $1.34 at $29.57

The solar cell maker swung to a quarterly profit and raised its 2008 sales outlook, but investor expectations were high, an Oppenheimer analyst says.

Brocade Communications Systems Inc., up 21 cents at $7.44

Third-quarter profit nearly doubled to beat Wall Street estimates, partly due to higher services revenue, the networking equipment maker reported.