Analyst upgrades: TMA, EXPE and PER

MOST NOTEWORTHY: Thornburg Mortgage, Expedia and Perot Systems were today's noteworthy upgrades:

Jefferies upgraded shares of Thornburg Mortgage Inc Corp (NYSE: TMA) to Buy from Hold as they believe the stock is at an inflection point, characterized by accelerated earnings and dividend growth.
Expedia Inc (NASDAQ: EXPE) was upgraded to Outperform from Neutral at Credit Suisse, as they believe the company is well-positioned to benefit from global e-travel and media opportunities, strong free cash flow, and attractive valuation.
Perot Systems Corporation (NYSE: PER) was upgraded to Sector Perform from Underperform at RBC Capital following its Q4 report.

OTHER UPGRADES:

HSBC raised Swiss Reinsurance Company (OTC: SWCEY) to Overweight from Neutral.
The Estee Lauder Companies Inc (NYSE: EL) was upgraded to Equal Weight from Underweight at Lehman.
Cantor upgraded Genomic Health Inc (NASDAQ: GHDX) to Buy from Hold.