Stocks that moved substantially or traded heavily Thursday on the New York Stock Exchange and Nasdaq Stock Market:
Smithfield Foods Inc., down 92 cents at $24.01
The St. Louis-based pork producer said that its fiscal second-quarter earnings slid 16 percent, as feed and other costs climbed.
Harvest Natural Resources Inc., down $1.04 at $7.73
The oil and gas company said it is closing and abandoning a well in Oman after failing to find any hydrocarbons in the well.
DemandTec Inc., up $4.72 at $13.15
Technology company International Business Machines Corp. said it is buying the price-management software company for $440 million.
Pacific Sunwear of California Inc., up 14 cents at $1.49
The surf and skate-inspired clothing retailer said it will try to improve its finances by closing up to 200 underperforming stores.
Tesla Motors Inc., down $3.30 at $30.89
A Morgan Stanley analyst cut his rating for the electric car company citing a weak consumer interest for electric vehicles.
Affymax Inc., up $2.12 at $7.98
A Food and Drug Administration panel voted in favor of the biotech drugmaker's experimental treatment for patients with anemia.
G-III Apparel Group Ltd., up $3.66 at $24.02
The clothing and accessories manufacturer said that its profit edged higher in its fiscal third quarter thanks to stronger sales.
Ciena Corp., up 12 cents at $12.03
The network equipment maker posted a smaller net loss for its fiscal fourth quarter thanks to higher revenue and lower expenses.