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MOST NOTEWORTHY: Sunoco, Valero Energy, UBS AG, Lehman Brothers and Supertex were today's noteworthy upgrades:
- Citigroup upgraded both Sunoco (NYSE: SUN) and Valero (NYSE: VLO) to Buy from Hold, as they believe both companies will benefit from the collapse of ethanol prices since refiners are mainly supplied under term contracts struck above current levels.
- Merrill upgraded shares of UBS (NYSE: UBS) to Buy from Neutral to reflect the company's lack of exposure to fixed income.
- Credit Suisse upgraded shares of Lehman Brothers (NYSE: LEH) to Outperform from Neutral citing improved performance prospects.
- Supertex (NASDAQ: SUPX) was raised to Buy from Neutral at Oppenheimer. The firm expects a rebound in all business segments, Medical is entering a seasonally strong September quarter, and notes Motorola (NYSE: MOT) shipments are growing.
OTHER UPGRADES:
Big 3 CEOs drive to Washington to suck up to Congress
GM and Ford ready weak pitches for taxpayer bucks
Cramer on BloggingStocks: A troika of opportunity and trouble 
