Editor's Note: In this feature from Stockpickr, we highlight lists of stocks that have been upgraded by analysts or are experiencing activist investor situations or some other market-moving events.

Rumors of the Day

: Shares of

3Com

( COMS) skyrocketed after the telecom-equipment maker agreed to a $2.2 billion deal to sell itself to Bain Capital and China's Huawei Technologies. The $5.30-a-share price represents a 44% premium of 3Com's closing price Thursday. The stock soared 35% to $4.98.

Today's Hot List

:

Lockheed Martin

(LMT) - Get Report

raised its quarterly dividend by 20% to 42 cents a share and increased its stock-repurchase program by an additional 20 million shares. Shares of the aerospace and defense company gained 1.3% to $108.19.

Investing services company

Duff & Phelps

(DUF)

debuted on the

New York Stock Exchange

in its initial public offering Friday. The stock is trading up 8% at $18.39, after pricing 8.3 million shares at $16 apiece.

Analyst Downgrades

: UBS downgraded

Atlantic Tele-Network

(ATNI) - Get Report

to neutral rating from buy but raised its price target to $40 from $35. It also lifted its full-year 2008 earnings-per-share estimates to $2.09 from $2.06. Shares sunk 6% to $36.13.

Analyst Upgrades

: Keefe, Bruyette & Woods upgraded

Cullen/Frost Bankers

(CFR) - Get Report

to outperform from market perform. KBW lowered estimates because of the recent interest rate cut but said the company has a solid balance sheet and the stock appears inexpensive. Shares added 43 cents to $50.50.

Latest Activist Situations

: According to StreetInsider.com's 13D Tracker page, FL Group, a large shareholder of

AMR

(AMR)

is urgign the American Airlines parent to consider strategic alternatives to increase shareholder value. In a regulatory filing, the firm said alternatives include the separation of AAdvantage -- American Airlines' frequent flyer loyalty program -- from the main business. The firm believes such a move that such a spinoff could result in "value creation of more than $4 billion." AMR shares were up 1% at $22.27.

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