Alaska Air (ALK) closed at $35.83. ALK January call option implied volatility is at 35, puts at 40, February calls are at 39, puts at 45; below its 26-week average of 53, according to Track Data, suggesting decreasing price movement.

UAL Corp (UAUA) closed at $12.93. WTI Crude oil futures are recently up 0.40% to $74.70, according to Bloomberg. UAUA January option implied volatility is at 83, February is at 82; below its six-month average of 94, according to Track Data, suggesting decreasing price movement.

CBOE Volatility Index (VIX) at 19.54; 10-day moving average is 21.39.

Option Update is provided by Stock Specialist Paul Foster of theflyonthewall.com.

MOST NOTEWORTHY: Hess Corp (HES), American Home Mortgage Investment Corp (AHM) and Anglo American plc (AAUK) were today's noteworthy downgrades.

• Lehman Brothers downgraded Hess Corp (NYSE: HES) to Underweight from Equal-Weight based on valuation.
• American Home Mortgage Investment Corp (NYSE: AHM) was cut to Underperform from Market Perform at Keefe Bruyette, to Market Perform from Outperform at Friedman Billings, to Equal-Weight from Overweight at Lehman Brothers, to Sell from Hold at Citigroup and to Hold from Buy at Deutsche Bank.
• Anglo American plc (NASDAQ: AAUK) was downgraded to Underperform from Market Perform at BMO Capital Markets based on valuation.

OTHER DOWNGRADES:

• Murphy Oil Corp (NYSE: MUR) was cut to Equal-Weight from Overweight at Lehman.
• Credit Suisse downgraded Alaska Air Group, Inc (NYSE: ALK) to Neutral from Outperform.
• Gabelli downgraded shares of A. Schulman, Inc (NASDAQ: SHLM) to Hold from Buy to reflect the company's weak second-quarter.
• Raymond James downgraded Avnet, Inc (NYSE: AVT) to Market Perform from Outperform.
• Blyth, Inc (NYSE: BTH) was cut to Sell from Hold on valuation.

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