Showtime on Wall Street

NEW YORK (CNNMoney.com) -- U.S. stock investors will try to sort through the corporate announcements at some key trade shows Monday as the first full trading week of 2007 begins.

At 6 a.m. ET, Nasdaq and S&P futures were higher. But markets looked to open mixed or lower after fair value was considered.

Oil rebounded a little from last week's sharp selloff, with U.S. crude futures up 48 cents to $56.79 a barrel in electronic trading.

In corporate news, Caremark Rx (Charts) said Sunday it rejected a $26 billion takeover bid from Express Scripts (Charts), in favor of a $22.2 billion offer from CVS (Charts).

And General Motors (Charts) got a boost by sweeping the North American International Auto Show's car and truck of the year awards for the first time in the company's history.

The auto show in Detroit is one of three major trade shows producing headlines this week. In addition, the Consumer Electronics Show is getting underway in Las Vegas and the MacWorld Expo, which will feature the latest Apple (Charts) products, takes place in San Francisco.

Among other stocks making news in advance of the open were General Electric (Charts), Northrop (Charts) and Microsoft (Charts).

On the economic front, investors will be paying attention to November's consumer credit report due out later in the session.

Treasury prices slipped, with the 10-year note yield rising to 4.66 percent from 4.64 percent late Friday.

Stocks ended lower in Asia and European shares were higher in midday trade.

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