$19.99 (week's change: -14.1%)
52-week return: -21.4%
The FDA ordered the drug maker's ECR Pharmaceuticals unit to stop marketing the antihistamine Lodrane, causing the biggest weekly selloff in Hi-Tech stock since October 2009.
$22.01 (week's change: -25.1%)
52-week return: +1.3%
The owner and landlord of gas station properties lost a quarter of its stock market value after a change in ownership at its largest tenant raised concerns over future revenue.
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