April 27, 2015: Here are four stocks among the 36 equities making new 52-week lows today.

Celladon Corp. (NASDAQ: CLDN) dropped nearly 81% on Monday to post a new 52-week low of $2.62 against a high of $28.25. The stock closed at $13.68 on Friday night. Volume was about 30-times the daily average of around 1 million shares. The drugmaker reported a negative test result this morning.

3D Systems Inc. (NYSE: DDD) also posted a new 52-week low on Monday. Shares dropped about 6.9% to $25.36 from Friday’s closing price of $27.230. The stock’s 52-week high is $69.56. Volume is nearly double the daily average of around 2.6 million shares. The 3D-printer maker lowered guidance last week and analysts were downgrading the stock today.

Windstream Holdings Inc. (NASDAQ: WIN) dropped nearly 18% on Monday to post a new 52-week low of $10.09 after closing at $12.26 on Friday. The stock’s 52-week high is $13.30. Share volume was 70% above the daily average of around 10 million shares traded. The company completed a spin-off of its communications Sales & Leasing business, and no one seems to be sure what the remaining company is worth.

Aerie Pharmaceuticals Inc. (NASDAQ: AERI) dropped more than 18% on Monday to post a new 52-week low of $10.52 after closing at $12.87 on Friday. The stock’s 52-week high is $35.89. Share volume was more than 8-times the daily average of around 660,000 shares traded. The drug company reported an unsuccessful drug trial last week, and the carnage continues.

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