Research In Motion (NASDAQ: RIMM) is up almost 5% on strong earnings and guidance.

eBay (NASDAQ: EBAY) is up almost 3% on an analyst upgrade.

ATS Medical (NASDAQ: ATSI) is up over 14% on guidance that is above Wall Street estimates.

HNI Corp (NYSE: HNI) is off over 6% on a weak Q1 outlook.

MEMC Electonic Devices (NYSE: WFR) is down over 9% after cutting its Q1 guidance.

Stocks may trade differently in the pre-market than they do in the regular session.

Douglas A. McIntyre is an editor at 247wallst.com.

MOST NOTEWORTHY: Schering-Plough Corp (SGP), Southwest Airlines Co (LUV), Capital One Financial Corp (COF), Robert Half International Inc (RHI) and Heartland Express, Inc (HTLD) were today's more noteworthy downgrades:

• Schering-Plough Corp (NYSE: SGP) was downgraded to Market Perform from Strong Buy at Raymond James, to Neutral from Overweight at HSBC and to Hold from Buy at AG Edwards on valuation.

• HSBC also cut Southwest Airlines Co (NYSE: LUV) to Neutral from Overweight.

• Capital One Financial (NYSE: COF) was cut to Market Perform from Outperform at Freidman Billings and to Neutral from Buy at Merrill Lynch following its first quarter miss.

• Stifel downgraded Robert Half International (NYSE: RHI) to Sell from Hold after its disappointing first quarter report.

• Stifel also cut Heartland Express Inc (NASDAQ: HTLD) to Hold from Buy on valuation.

OTHER DOWNGRADES:

• Jefferies downgraded shares of RightNow Technologies (NASDAQ: RNOW) to Hold from Buy with a $17 target. William Blair downgraded RightNow to Market Perform from Outperform based on the company's sales organization changes and weak bookings.

• Shares of CBRL Group, Inc (NASDAQ: CBRL) were downgraded at JP Morgan to Neutral from Overweight based on difficult near-term fundamentals and limited visibility.

• Baird cut HNI Corp (NYSE: HNI) to Underperform from Neutral.

• China Eastern Airlines (NYSE: CEA) was downgraded to Sell from Hold at Deutsche Bank.

• Brean Murray downgraded Genitope (NASDAQ: GTOP) to Sell from Hold.

• Sandler O'Neill downgraded shares of Capitol Bancorp Ltd (NYSE: CBC) to Sell from Hold.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).