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Midday Movers: STJ, VSI, GNC & More

Take a look at some of Wednesday's midday movers:

St. Jude Medical fell after the company warned it could receive a warning letter from the FDA about one of its manufacturing facilities in California. The company also reported weak quarterly earnings.

Vitamin retailers Vitamin Shoppe and GNC Holdings rose after a new study said multivitamins may lower the cancer risk in men.

Green Mountain jumped after the coffee retailer said it plans to expand overseas. The company currently generates 99 percent of its revenue from North America.

Textron lost ground after the conglomerate reported weaker-than-expected earnings.

Homebuilders surged after a strong September housing starts report. Lennar, DR Horton, Pulte, Toll Brothers and KB Homes all moved higher.

Home Depot and Lowe's gained ground as well on the housing data.

Oil driller Halliburton declined as the company's third-quarter profits fell.

BP moved higher after the oil company said its nearing a deal to sell its stake in TNK-BP to a Russian state-owned oil company.

Health insurer Centene rose following news it was leaving the Kentucky Medicaid market.

Quest Diagnostics moved lower after the company lowered its 2012 earnings and revenue expectations.

Piper Jaffray moved higher after the company swung to a third-quarter profit and topped Street forecasts.

Dean Foods rose after its Whitewave Foods units said it expects its 20 million share IPO will price between $14 and $16 a share.

(Read More: CNBC's Market Insider Blog)

—By CNBC's Rich Fisherman.

Questions? Comments? Email us at marketinsider@cnbc.com