SEATTLE - A person familiar with Microsoft's bid for Yahoo said Friday the software company is evaluating its offer in light of the economic climate and the Internet pioneer's deteriorating business.

The person, who asked not to be named because he was not authorized to speak publicly, said Yahoo Incorporated's share of the search market and overall condition have deteriorated since Microsoft announced its bid Feb. 1.

At the time, Microsoft offered $44.6 billion, or 62 percent above Yahoo's market value. The deal is currently valued at about $41 billion, based on Friday's closing share prices.

Yahoo's board formally rejected the Microsoft Corp. bid, saying it undervalues the company. The Silicon Valley company has since explored alliances with Google Inc., News Corporation's MySpace.com and Time Warner's AOL, but no alternative to Microsoft's offer has surfaced.

Yahoo spokeswoman Diana Wong declined to comment about assertions that the Web portal company's business is declining.

Yahoo and Microsoft both lost less than 1 percent of their share of U.S. Web searches in February, the most recent month for which data are available, according to the research group comScore. During that month, Yahoo grabbed 21.6 percent of searches, more than Microsoft's 9.6 percent. Google's share rose less than 1 point to 59.2 percent.

In the intervening weeks, Yahoo released internal projects drawn up in December that call for the company's revenue to increase more than 70 percent during the next three years.

The Web company also postponed its annual shareholder meeting, and thus the deadline for Microsoft to nominate its own slate of directors to fill Yahoo's board. A new date has not been set.

On Friday, the person familiar with Microsoft's thinking said the company has been patient -- but will be so only to a point.

"It's up to Yahoo's board to engage in meaningful negotiations with Microsoft," the person said.

Senior executives of the two companies reportedly met this week near Yahoo's Sunnyvale, Calif., headquarters, but walked away without advancing the negotiations, according to the Wall Street Journal.

Spokespeople for Microsoft and Yahoo declined to comment when asked about the meeting.

Shares of Yahoo fell more than 3 percent in after-hours trading to $27.40. Microsoft's stock edged up 1.5 percent to $29.60.