Google, founded just 9 years ago, now has a market value of almost $175 billion, more than long-established technology bellwethers like Hewlett-Packard Co. and IBM Corp. The stock has increased by more than six-fold from its initial public offering price of $85 in August 2004.

The latest run-up in Google's stock represents a turnaround from a little over a month ago when the shares briefly dipped below $500 amid the stock market turmoil triggered by a home mortgage meltdown that raised fears about a recession.

Those worries have lessened because of the Federal Reserve Bank's decision to lower short-term interest rates by 0.5 percentage point in a move expected to free up more money for consumers and businesses to spend.

Google stands to benefit because it runs the largest advertising network on the world's hottest marketing medium, the Internet.

Despite aggressive challenges by rivals like Yahoo Inc. and Microsoft Corp., Google has been able to widen its lead in search - the activity that triggers the text-based ad links that have become a huge moneymaker.

In August, Google handled 54 percent of all U.S. search requests, up 50 percent at the same time last year, according to the research firm Nielsen/NetRatings Inc. Yahoo lagged well behind at 20 percent followed by Microsoft at 13 percent.

The formidable lead enabled Google to earn $1.9 billion on $7.5 billion in revenue during the first half of the year. The company usually makes even more money during the second half because of the advertising blitz that accompanies the holiday shopping season.