The following stocks were among those that moved substantially or traded heavily Monday on the New York Stock Exchange and the Nasdaq Stock Market:
Exxon Mobil, down $3.14 at $69.69
Exxon Mobil will buy XTO Energy in an all-stock deal worth $29 billion to capitalize on the growing supply of natural gas at home.
Citigroup Inc., down 25 cents at $3.70
Citigroup is repaying $20 billion in public bailout money, while the government also will sell its one-third stake in the company.
RadioShack Corp., up 77 cents at $20.25
An analyst raised his rating for the consumer electronics company on the addition of T-Mobile and a nationwide rollout of the iPhone.
Convergys Corp., down 40 cents at $10.64
Standard & Poor's said it will be dropping the outsourcing providers stock from the S&P 500 at the end of this week.
Invacare Corp., down 72 cents at $25.47
The home medical equipment company received a downgrade to "Hold" from "Buy" from a Stifel Nicolaus analyst.
Oracle Corp., up 53 cents at $23.31
European Union regulators looked closer to approving Oracle's takeover of Sun Microsystems Inc. after constructive discussions.
Charles Schwab Corp., down 68 cents at $17.75
The retail brokerage said daily trading volume dropped 27 percent in November from a year ago, further eroding falling revenue.
Trustmark Corp., up $1.03 at $21.30
An analyst upgraded the stock, saying the regional bank has cash for lucrative acquisitions after repaying federal bailout money.