Editor's note: In this feature from Stockpickr, we highlight lists of stocks that have made new highs, lows or seen other unusual activity.

Biggest % Gainers

: U.S. ethanol producer

Xethanol

( XNL) surged 25% Friday on no immediate news. Shares increased 31 cents on 6 times average volume to close at $1.52.

Biggest % Losers

:

Quantum Fuel Systems Technologies

(QTWW)

plunged 18% after announcing it will sell 12.5 million shares to institutional investors for $1.50 a share -- 28% below the stock's previous closing price. The auto-parts maker fell 42 cents to close at $1.67.

52-Week Highs

: China's

Sohu.com

(SOHU) - Get Report

soared to a 52-week high of $29.96 after a Credit Suisse analyst upped the Internet company to outperform, noting the success of one of the site's multiplayer games. The stock increased $2.33, or 8%, to close at $29.87.

52-Week Lows

:

InPhonic

( INPC) shares fell 13% to a 52-week low of $5.07 Friday after the wireless communications company reported a wider first-quarter net loss. The Washington, D.C., company was also downgraded by Deutsche Bank, which cut its rating from buy to hold, noting negative cash flow and weak subscription services. Shares fell 79 cents to finish the day at $5.18.

Rising on Unusual Volume

:

Accenture

(ACN) - Get Report

gained 86 cents or two percentage points on nearly 9 times average volume after the management services company confirmed strong alliance with

Cognos

( COGN). Shares closed at $42.63.

Stocks with Unusual Option Activity

:

JDSU

(JDSU)

was experiencing unusual options activity. The stock closed down 23 cents, or 1.7%, at $13.57.

Latest-Activist-Situations

: In a 13D filing on

China Security & Surveillance Tech

, Clinton Group disclosed a 5% stake, or 1.7 million shares, in the company and a letter to the CEO expressing its support of the company's management and its excitement about the company's growth prospects. Shares closed down 45 cents, or 3%, at $15.30.

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( PCU) going to $131 a share by late July,

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