Winners and Losers: AgFeed

Updated from 2:35 p.m. ET

Ag Feed Industries(FEED Quote) shares soared 61% Monday after the company announced its full-year profit more than doubled.

Shares were up 66 cents to $1.74 after the China-based company, which makes animal feed and pork products, said its hog-production capacity saw a big increase. AgFeed posted a 2008 profit of $16.9 million, or 53 cents per share, up from $6.7 million, or 25 cents per share, in 2007.

Shares of WSP Holdings(WH Quote), a China-based maker of tubular products used in oil and gas exploration, were up 27%, or 61 cents to $2.91 Monday after the company announced it would pay a 30-cent divided per U.S. American depositary share and a one-time special cash dividend of 45 cents per ADS out of its annual profits for the years ended Dec. 31, 2007 and Dec. 31, 2008.

Shares of PetroQuest Energy(PQ Quote), an independent oil and gas producer based in Lafayette, La., were up 17%, or 36 cents to $2.45.

Arena Pharmaceuticals(ARNA Quote) shares were down 21.6%, or $1.10, to $3.99 following a downgrade from Canaccord Adams from hold to sell. Volume was more than 4.9 million shares.

Sonic Automotive(SAH Quote) shares were down 15%, or 23 cents to $1.28. A survey of analysts by Thomson Reuters expects the Charlotte, N.C.-based auto retailer to report earnings today of 3 cents a share, 65 cents less than the fourth quarter of 2007.