On the upside
Dendreon (Nasdaq: DNDN) announced that its D-3263 treatment has potential to reduce benign prostatic hyperplasia.
First quarter earnings for Waters (NYSE: WAT) rose to beat expectations by a wide margin as expenses dropped.
Aaron's (NYSE: AAN) reported sharply higher first quarter earnings that surpassed estimates prompting the appliance and furniture rental company to lift its full year outlook.
On the downside
Seaspan (NYSE: SSW) reversed year ago losses to post a first quarter profit but revenue fell short of estimates and the company slashed its dividend.
Masco (NYSE: MAS) swung to a first quarter loss as new home construction tumbled prompting the building products maker to cut its full year outlook.
Olin (NYSE: OLN) reported higher first quarter income but the results missed expectations and the company forecast disappointing second quarter results.
In the broad market, advancing issues outpaced decliners by a margin of 5 to 4 on the NYSE and by nearly 5 to 3 on Nasdaq. The Russell 2000 which tracks small cap climbed 7 points to 477.