Yahoo, the internet search and media company, has more than doubled net profits in the first quarter to $101m.
A recovery in traditional online and web-search advertising is driving up revenues at the web firm.
It is one of the world's most visited sites and has services such as personal advertisements, for which users pay a fee.
Yahoo and other internet stocks have restored market faith, confirmed by rises in the Nasdaq technology index.
Tech stock recovery
In the past investors had been fleeing dot.com companies amid jitters about their long-term viability.
The rash of dot.com failures has caused large internet companies like NBC Internet to lose important advertisers, but these results back Yahoo's claim that it would not be threatened by the fall-out.
The shake-out in the internet sector seems to have even benefited companies like Yahoo because advertisers like to focus on the more popular sites.