Analyst upgrades:

• Societe Generale upgraded shares of Veolia Environment (NYSE: VE) to Buy from Hold as they believe the company's new finance chief implement additional cost savings.
  
• Citigroup upgraded shares of Sun Healthcare (NASDAQ: SUNH) to Buy from Hold and added the stock to their Top Picks Live List as they believe the market is pricing in a more severe Medicaid and Medicare reimbursement outlook than is probable. The firm has a $14 target on the stock.
  
• Calyon believes in 2010, American Express (NYSE: AXP) will have easy comps, reserve releases, and income statement leverage. The firm upgraded shares to Outperform from Underperform.
• Societe Generale (OTC: SCGLY) was upgraded to Buy from Hold at Citigroup.
  
• Caterpillar (NYSE: CAT) was raised to neutral from Sell at UBS.
  
• Goldman upgraded Biogen Idec (NASDAQ: BIIB) to Buy from Neutral and added shares to the Conviction Buy List; Goldman also added Bristol-Myers (NYSE: BMY) to the Conviction Buy List.

"Infrastructure stocks have been laid low by the economic downturn; but once massive government stimulus programs get growth going again, these companies should be among the surest winners," says Stephen Leeb.

In The Complete Investor newsletter, the advisor explains, "We've found four top infrastructure stocks, now at bargain-basement levels, that we think will surge. All are all astonishingly cheap when you consider how vital their role is in worldwide economic growth."

"It would be difficult to find a group of stocks more leveraged to economic growth yet whose valuations imply there will be no growth.

"If you have any faith in the world's future, these stocks are for you, and we think they will be dramatic outperformers as stimulus spending starts to kick in.

"Most diverse among the four is Jacobs Engineering (NYSE: JEC), which serves the chemical, pharmaceutical, building/infrastructure, and oil and gas industries. Nearly 20% of its revenues come from government sources, domestic and foreign.

"The company has nominal debt and has been generating hefty free cash flow, which management has indicated it may use to acquire beaten-down compatible firms, adding to future growth.

Wall Street's equity market kicks into fifth gear this week with 8 IPOs and 6 Secondaries on the docket.

Those deals tentatively scheduled to price include:

IPOs:

Possible

• SP Acquisition (DSP), a 36M-share IPO for this business financing company. UBS Investment and Ladenburg Thalmann are the lead managers. Filing pricing: $10.00.

Midweek

• Mediatech Investment (MDTC), a 10M-share IPO for this business financing company. UBS Investment and JMP Securities are the lead managers. Filing range: $14.00-$16.00.