• Bernstein upgraded Amgen (NASDAQ: AMGN) to Outperform from Market Perform on valuation as it believes threats to the core business are priced in at current levels and upside catalysts may come from pipeline news. The firm raised its target on shares to $65 from $57.
• Stephens upgraded CyberSource (NASDAQ: CYBS) to Overweight from Equal Weight on valuation as it believes the recent pullback creates a buying opportunity. The firm raised its target on shares to $16 from $14.
• JPMorgan upgraded Magna (NYSE: MGA) and Tenneco (NYSE: TEN) to Overweight from Neutral on expectations global auto production has sequentially bottomed with European light vehicle production rebounding in Q2. The firm also sees a short-term trading opportunity in TRW Automotive (NYSE: TRW), but keeps a Neutral rating on the stock.
• SINA Corp. (NASDAQ: SINA) was upgraded to Conviction Buy from Buy at Goldman.
• Cogent Communications (NASDAQ: CCOI) was raised to Buy from Hold at Citigroup.

The major indices continued to rally into the close Monday, after spending most of the day down substantially. The Dow ended the day up fractionally and the S&P 500 was down less than one point. Institutional money continues to enter the markets, says Jim Cramer, and that has limited the size and duration of pullbacks.

Even as the uncertainty comes out of the markets, the clarity that replaces it is tepid at best. But with the S&P 500 resting at seven-month highs, one troublesome sector has badly lagged: housing and home-building stocks.