* Gold holds gains after Fed cuts rates by 50 bps to 1 pct
* Silver jumps as stock gains boost industrial metals
* U.S. stock markets up more than 2 pct in late trade (Recasts, updates prices, market activity to close; adds second byline, dateline, previously LONDON)
By Frank Tang and Jan Harvey
NEW YORK/LONDON, Oct 29 (Reuters) - Gold hit a one-week high as the dollar weakened sharply on Wednesday, and the precious metal stayed firm after the Federal Reserve cut U.S. interest rates, as markets had expected.
Gold's rise came amid strength across the entire commodity sector as global markets welcomed the Fed's recession-fighting rate cut. Silver and palladium, sometimes seen as industrial metals, also rallied as stocks kept rising.
The U.S. Federal Reserve lowered its target for overnight bank lending rate by half a percentage point to 1 percent, the lowest since June 2004.
"I think it has already been factored into the market, honestly. That's why gold had these substantial rallies," Bruce Dunn, vice president of trading at New Jersey-based Auramet Trading.
Dunn, however, contended that a rate cut alone would do little to boost the ailing U.S. economy.
"Nothing has changed in the last 48 hours. They cut rates, so what? They have been cutting rates for a long time, and things have progressively gotten worse," Dunn said.
Spot gold <XAU=> rallied to $773.40 an ounce and was at $749.85 an ounce at 3:06 p.m. EDT (1906 GMT), against its Tuesday close of $744.30.
U.S. gold futures for December delivery <GCZ8> settled up $13.50, or 1.8 percent, at $754.00 an ounce on the COMEX division of the New York Mercantile Exchange.
The Federal Open Market Committee said in a statement that "The pace of economic activity appears to have slowed markedly, owing importantly to a decline in consumer expenditures."
The Fed said it expected inflation to moderate in coming quarters due to declining prices for energy and other commodities and prospects for weaker economic activity.
Gold has fallen about 20 percent since it hit a high of $931 on Oct. 10 as financial market losses prompted investors to liquidate commodities and other assets.
"Now with more interest rate cuts and more aggressive action by central banks, the indiscriminate selling of financial assets, including gold, has subsided," said Jeffrey Nichols, managing director of American Precious Metals Advisors.
The dollar fell against other major currencies, as rising stock markets boosted risk appetite and traders factored in a substantial Fed rate cut later in the day. [
]Rises in other commodity markets help boost gold prices. The broad-based Reuters/Jefferies CRB index <.CRB> jumped 6 percent.
Platinum <XPT=> fell to close at $789 an ounce from its Tuesday close of $809.00, but rebounded smartly in late trade from a session low of $755.50 an ounce.
Reports of production cutbacks and falling sales among car manufacturers have erased 65 percent from platinum's value since March. The automotive industry, which uses the metal in catalytic converters, accounts for more than half of global platinum demand.
Palladium <XPD=> was at $189.50, up from its Tuesday close of $176, having surged more than 10 percent to a two-week high of $195 on speculation the sell-off in the metal was overdone.
Spot silver <XAG=> was at $9.82 an ounce, after rising to a one-week high of $10.02, against its previous finish of $9.16. (Additional reporting by Humeyra Pamuk in London; Editing by David Gregorio)