This will not hamper a deal between Sprint and Nextel, which mostly involves exchanging stock.

Oracle agreed to exchange stock for up to 30 percent of Siebel.

Nationsbank will exchange stock worth $75.18 - based on Thursday's closing price - for each Barnett share.

California Energy is offering to exchange cash and stock it values at a total of $35 for each of 12.4 million Magma shares.

It will exchange stock worth $97.55 for each Lycos share, a 106 percent premium over Lycos's value last week before the deal was announced.

The companies exchanged stock as a condition of the merger, an executive involved in the transaction said.

That is because Citicorp will be exchanging preferred stock with a book value of $540 million for common now worth 27 percent less.

Under the deal, Texaco will exchange common stock for all outstanding Monterey shares at $21 a share.

The next step is Western Union's offer to exchange cash, common stock and new notes for the company's outstanding 19.25 percent and 16 percent notes.

American Radio said late on Thursday that it would exchange common stock valued at about $64 million and would also pay cash and assume debt.