However, Wall Street remained unconvinced that Microsoft’s $43 offer undervalues the company. In after-hours trading, Yahoo! shares were virtually unchanged at $28.36. At the end of formal trading Tuesday, it closed at $28.54, while the Microsoft offer values each Yahoo! share at $31, the Times Online reported.

Since this offer was brought up in January, Yahoo! has approached News Corporation and AOL, and has explored a possible joint venture with its bigger rival, Google.

Yahoo!, which claims to reach three out of four American Internet users, is trying to find another partner, in order to avoid being acquired or extract a higher price from Microsoft.

It has already rejected a takeover proposal from Microsoft, claiming that the offer price was too low.

Microsoft wants this deal done because Yahoo! can help compete more aggressively with Google, and seize a share of the online ad market, which is estimated to be worth $40 billion, and is expected to double in two years, according to the article posted on the Time Online.