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 % Losers

:

Tarragon

( TARR) plunged 67% Thursday, after it said liquidity issues prevented the company from completing about $50 million in financial transactions that should have taken place this month. The New York-based homebuilder said this and other issues raise doubt about the company's future. Shares fell $1.88 to 94 cents.

52-Week Lows

:

Citi Trend

(CTRN) - Get Citi Trends, Inc. Report

sank 30% to a 52-week low, after the Savannah, Ga.-based apparel retailer reported a weak earnings outlook. The company estimates second-quarter income between 2 cents and 5 cents a share, but Thomson Financial was looking for 15 cents a share. Citi Trend blamed poor same-store sales as the company closed down $11.51 to $26.57.

Biggest % Gainers

:

The Knot

(KNOT)

jumped 24.9% after the company announced second-quarter earnings that blew by Wall Street's estimates. The wedding-planning Web site earned $4.8 million, or 15 cents a share, on revenue of $28.5 million. Analysts expected earnings of only 10 cents a share. The stock closed up $4.65 to $23.33.

52-Week Highs

:

Zumiez

(ZUMZ) - Get Zumiez Inc. Report

added 4.7% in reaching an all-time high, after the sports clothing and accessories retailer said its July same-store sales rose 9.7%. The company gained $2.02 Thursday to $44.95.

Rising on Unusual Volume

TheStreet Recommends

:

Life Time Fitness

(LTM) - Get LATAM Airlines Group SA Sponsored ADR Report

gained 2.6% on volume almost five times its three-month average volume. The fitness center operator closed $1.65 to $63.38.

Stocks with Unusual Option Activity

:

Southern Copper

( PCU) was experiencing unusual option activity Thursday. The Phoenix-based metal miner slid $6.23, or 5.83%, closing at $100.54.

Latest Activist Situations

: Daniel Loeb's Third Point disclosed it had raised its stake in

Cypress Semiconductor

(CY) - Get Cypress Semiconductor Corporation Report

to 5.1% and pressed for the company to pursue strategies for increasing its value. The San Jose, Calif.-based company's stock closed up 85 cents, or 3%, to $28.44.

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