The top after-market NASDAQ Stock Market gainers are: Gibraltar Industries, Nara Bancorp, Bon-Ton Stores, Medivation, and Altra Holdings. The top after-market NASDAQ Stock Market losers are: Open Text, Qlik Technologies, China Gerui Advanced Materials Group, Home Inns & Hotels Management, and Shanda Interactive Entertainment.

Gainers

Gibraltar Industries, Inc. (ROCK) stock jumped 14.73 percent to $8.80 in the after-market trading.

Nara Bancorp Inc. (NARA) stock climbed 14.65 percent to $7.28 in the after-market trading.

Bon-Ton Stores Inc. (BONT) stock advanced 13.65 percent to $7.16 in the after-market trading.

Medivation, Inc. (MDVN) stock grew 12.83 percent to $17.33 in the after-market trading.

Altra Holdings, Inc. (AIMC) stock grew 12.27 percent to $15.92 in the after-market trading.

Losers

Open Text Corp. (OTEX) stock fell 7.92 percent to $52.92 in the after-market trading. Profit for the fourth quarter was $28.6 million or $0.49 per share, down from $53.2 million or $0.92 per share last year. Adjusted earnings were $61.5 million or $1.05 per share, up from $54.9 million or $0.95 per share last year. Revenue grew 19 percent to $285.5 million. Analysts had expected profit of $1.13 per share on revenue of $279.25 million.

Qlik Technologies, Inc. (QLIK) stock tumbled 6.48 percent to $25.11 in the after-market trading.

China Gerui Advanced Materials Group Ltd. (CHOP) stock slid 6.32 percent to $3.41 in the after-market trading. Chinese yuan

Home Inns & Hotels Management Inc. (HMIN) stock declined 4.01 percent to $33 in the after-market trading. Profit for the second quarter was 122.1 million Chinese yuan or $18.9 million, compared to 135.8 million Chinese yuan last year. Earnings per American Depository Share (ADS) were 1.71 Chinese yuan or $0.26. Adjusted earnings were 114.5 million Chinese yuan or $17.7 million, compared to 148.4 million Chinese yuan last year. Adjusted profit per ADS was 2.48 Chinese yuan or $0.38. Revenue grew 12.2 percent to 905.2 million Chinese yuan or $140.1 million. Analysts had expected profit of $0.35 per share on revenue of $137.12 million. Looking ahead into the third quarter, the company expects revenue of 955 million Chinese yuan to 975 million Chinese yuan, or $147.8 million to $150.8 million, while Street predicts $154.57 million. For the fiscal 2011, the company lowered its revenue growth outlook to range of 15 percent to 17 percent from previous range of 18 percent to 20 percent, while Street predicts growth of 23.10 percent.

Shanda Interactive Entertainment Ltd. (SNDA) stock decreased 3.34 percent to $31.22 in the after-market trading.