U.S. stocks climbed Friday, with DuPont, Alcoa and Caterpillar leading broad gains. Investors took comfort in Federal Reserve Chairman Ben Bernanke's promise to do what it takes to support an economic recovery, along with a better than feared revision of second quarter economic growth.

The Dow Jones Industrial Average rose 164.84 points, or 1.65%, to 10150.65, its biggest one day gain since Aug. 2. Still, the measure fell 0.62% during the week, its third straight week in the red. It is now off 3.01% for the month and it has fallen 2.66% this year.

In Friday's session, DuPont added 1.52, or 3.9%, to 41.01, while Alcoa advanced 31 cents, or 3.1%, to 10.32, and Caterpillar gained 1.95, or 3.1%, to 65.90.

The gains came as Federal Reserve Chairman Ben Bernanke said he is ready to do what it takes to support an economic recovery that has been losing steam.

Bernanke also said he expects the U.S. economy to continue growing in 2011 and subsequent years, signaling further Fed action may not be needed.

Also providing some relief, the Commerce Department's revision to second quarter gross domestic product came in at 1.6%, below the previous estimate but better than expected. Investors even took an optimistic approach to a guidance cut from Intel, which rose 19 cents, or 1.1%, to 18.37.

The chip giant lowered its third quarter revenue and gross margin targets as weaker than expected consumer demand for personal computers takes its toll.

However, investors said the warning wasn't a surprise, and focused on a bright spot Intel noted: there is solid enterprise demand helping offset the impact of lower volume.

Hewlett-Packard was the Dow's lone decliner. The stock fell 22 cents, or 0.6%, to 38, as its battle with Dell for data storage company 3Par continued.

The Nasdaq Composite climbed 34.94, or 1.65%, to 2153.63. The Standard & Poor's 500 index added 17.37, or 1.66%, to 1064.59. All of the measure's sectors closed in positive territory, led by the materials sector.

European market

European stock markets ended a volatile session with gains Friday, lifted by better than expected U.S. growth data and Federal Reserve Chairman Ben Bernanke's promise to strongly resist deflation.

The Stoxx Europe 600 index rose 0.6% to finish at 251.24 points after dipping in and out of positive territory several times during the session.

The index has fallen 1.6% so far this month. European markets reacted positively after the U.S. Commerce Department cut its estimate for second quarter gross domestic product growth to 1.6% a sharp reduction from the previous estimate of 2.4%, but still not as bad as the 1.3% forecast of economists.

But gains were largely wiped out after Intel Corp. cut its third-quarter sales forecast to around $11 billion from a range of $11.2 billion to $12 billion, citing weaker than expected demand for consumer PCs.

Subsequently, markets rebounded, as Bernanke said the Fed wouldn't let the U.S. economy sink into a period of deflation. In the U.K., the FTSE 100 index rose 0.9% to 5,201.56 points and the French CAC 40 index advanced 0.9% to end at 3,507.44.

The German DAX 30 index gained 0.7% to 5,951.17 points. Shares of German retailer Metro AG rose 2.4%, as French rival Carrefour advanced 3.3% in Paris after reportedly being upgraded to buy from hold at Citigroup.

Following the news from Intel, some European technology stocks came under pressure, with STMicroelectronics falling 3.9% in Paris and Infineon Technologies losing 1% on Xetra in Frankfurt.

Asian market

Asian stock markets ended mixed Friday as some investors stayed cautious ahead of 2Q U.S. GDP data and a speech by Federal Reserve Chairman Ben Bernanke, while shares in Tokyo rose amid hopes of possible stimulus measures and potential government action to stem the yen's strength.

Japan's Nikkei Stock Average ended 1.0% higher, South Korea's Kospi Composite closed flat, Hong Kong's Hang Seng Index was 0.1% lower, while China's Shanghai Composite Index climbed 0.3%.

Shares in Japan rebounded from morning losses after local media reports earlier said that Japanese Prime Minister Naoto Kan would hold a press conference later in the day to address the stronger yen and unveil details on additional economic stimulus measures.

At the press conference after the market closed, Japanese Prime Minister Naoto Kan stepped up the tone of his warnings against the strengthening yen. Nissan Motor gained 3.2%, Honda Motor was up 1.6%, and Sony added 2.7%.

Commodities and metals

Base metals on the London Metal Exchange ended the week on a high note, as a rallying euro and mildly positive comments from U.S. Federal Reserve Chairman Ben Bernanke were enough to sweep the metals higher.

The strong closes put the metals back where they ended the previous week. Copper rose to a one week high of $7,472.25 a metric ton, and closed 2.1% higher. Nickel made the biggest gains with its 3% rise.

Crude futures ended the week with a three day rally, as comments by U.S. Federal Reserve Chairman Ben Bernanke Friday gave investors renewed confidence that the central bank would step in if the U.S. economic recovery is in jeopardy.

Light, sweet crude for October delivery settled up $1.81, or 2.5%, at $75.17 a barrel on the New York Mercantile Exchange.

Brent crude on the ICE futures exchange was up $1.63, or 2.2%, at $76.65 a barrel. Investors continue to buy gold as a haven but are reluctant to send it to a new record.

The most actively traded gold contract, for December delivery, rose 20 cents Friday to settle at $1,237.90 an ounce on the Comex division of the New York Mercantile Exchange after the U.S. government revised its second quarter GDP estimate to 1.6% from 2.4%, compared with economists' expectations for a larger cut to 1.3%.