Southwest Airlines (LUV) is hosting an analyst meeting on December 16. Overall option implied volatility of 31 is below its 26-week average of 35, according to Track Data, suggesting decreasing price movement.

Discover Financial Services (DFS) is scheduled to report Q4 EPS on December 16. Overall option implied volatility of 37 is near its 26-week average, according to Track Data, suggesting nondirectional price movement.

Options Update is by Stock Specialist Paul Foster of theflyonthewall.com

MOST NOTEWORTHY: Swift Transportation (SWFT), JetBlue (JBLU) and Southwest (LUV) top today's list of upgrades.

• Following Director Moyer's offer to buy Swift Transportation, Inc. (NASDAQ:SWFT) for $29 a share, the company was upgraded to Market Perform from Underperform at Wachovia, to Peer Perform from Underperform at Bear Stearns and to Neutral from Sell at Bank of America.
• JetBlue Airways Corp. (NASDAQ:JBLU) was upgraded by Raymond James to Outperform from Market Perform following the October traffic report.
• Southwest Airlines Co. (NYSE:LUV) was upgraded to Outperform from Underperform at Credit Suisse based on valuation.

OTHER UPGRADES:

• Medimmune, Inc. (NASDAQ:MEDI) was upgraded to Outperform from Market Perform at Friedman, Billings Ramsey, citing Numax data and increased sales expectations for the drug.
• Finally, H&R Block, Inc. (NYSE:HRB) was upgraded to Buy from Sell at Soleil. The firm believes H&R Block's decision to explore strategic alternatives could lead to a possible sale of the whole company or certain parts of the company.

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