Getting slashed to sell at UBS were credit-card companies Discover ( DFS - Get Report), down 9.2%; Capital One ( COF - Get Report), down 7.3%; and American Express ( AXP - Get Report), which lost 3.1%. UBS also cut Spain-based Banco Santander ( STD) to neutral from buy, prodding shares down 2.2% to $17.64.

Elsewhere in the red, Keefe Bruyette & Woods ( KBW) stock traded down 6.3% to $27.01 ahead of tomorrow's scheduled earnings report.

Car rental company Dollar Thrifty ( DTG) lost 36.8% to $16.45 after slashing 2007 guidance Friday after the close. The Tulsa, Okla.-based company now predicts adjusted earnings ranging from 90 cents to 95 cents a share, down from a previous forecast of $1.75 to $1.85 a share. Analysts polled by Thomson Financial have been expecting a profit of $1.82 a share.

Shares of Austin, Texas-based semiconductor company SigmaTel ( SGTL) skyrocketed 64.3% to $2.94 on news that privately held Freescale Semiconductor will buy the company for $110 million, or $3 a share in cash.

Tech stocks were down modestly as investors mulled over Microsoft's ( MSFT - Get Report) unsolicited bid for Yahoo! ( YHOO) and await Cisco's earnings later this week.

Shares of Yahoo! continued to gain after Microsoft offered $44.6 billion, or $31 a share, for the company Friday. Yahoo was up 95 cents, or 3.4%, to $29.33. Shares of Microsoft were down 26 cents, or 0.9%, to $30.19.

Cisco ( CSCO) fell $1.12, or 4.5%, to $23.82 ahead of the company's second-quarter earnings Wednesday.

Analysts polled by Thomson Financial are expecting EPS of 38 cents in the second quarter on $9.79 billion in revenue, compared with EPS of 33 cents on $8.43 billion in revenue a year ago. For the third quarter, analysts expect earnings of 39 cents a share on $10.19 billion in revenue, compared with earnings of 34 cents a share on $8.86 billion in revenue.

This article was written by a staff member of TheStreet.com.