Rite Aid, Petrobras, Harvest Natural Resources, Gentex and Ballard are big market movers

MarketsAssociated Press

Stocks that moved substantially or traded heavily Friday on the New York Stock Exchange and the Nasdaq Stock Market:

NYSE

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Rite Aid Corp. (RAD), up 10 cents to $7.62

The drugstore operator reported a 5.3 percent increase in December same-store-sales, which is a key performance indicator.

Petrobras (PBR), down 55 cents to $6.75

The oil company saw shares fall as crude prices continued their decline and Brazil's president, Dilma Rousseff started a new term.

Harvest Natural Resources Inc. (HNR), down 88 cents to 93 cents.

The energy company cancelled the sale of its remaining assets in Venezuela after failing to garner that country's approval.

Nasdaq

MiMedx Group Inc. (MDXG), down $1.80 to $9.73

The biomaterials company received a subpoena in regard to marketing activities from the Department of Health and Human Services.

Ballard Power Systems Inc. (BLDP), down 16 cents to $1.82

The fuel cells developer terminated two licensing deals in China, citing material breaches of the agreements by Azure Hydrogen.

Gentex Corp. (GNTX), down $18.26 to $17.87

The maker of automatic-dimming rearview mirrors and electronics declared a 2-for-1 stock split in the form of a stock dividend.

Brainstorm Cell Therapeutics Inc. (BCLI), up $2.70 to $7.46

The biotechnology company is expected to release final midstage study results for a potential stem cell therapy aimed at ALS.

Perfect World Co. (PWRD), up $3.50 to $19.26

The Chinese online game developer received a buyout offer from Chairman Michael Yufeng Chi that would take the company private.