* China rate hike could slow economy, curb oil demand
* Dollar strengthens broadly, pressures oil
* Coming up: EIA inventory data, 10:30 a.m. EDT Wednesday
(Recasts, updates with settlement prices, market activity)
By Robert Gibbons
NEW YORK, Oct 19 (Reuters) - Oil fell more than 4 percent to below $80 a barrel on Tuesday, the biggest drop in more than eight months, as China hiked interest rates to cool its booming economy.
China's rate rise, its first since 2007, is aimed at curbing inflation and raised concerns about demand growth for commodities and strengthened the dollar.
"This dollar-driven move has pulled down prices across the board in the oil markets," said Tom Knight, a trader at Truman Arnold in Texarkana, Texas.
U.S. crude for November <CLc1> delivery fell $3.59, or 4.32 percent, to settle at $79.49 per barrel, the biggest one-day percentage dive since early February.
A day ahead of the U.S. November contract's expiration and before release of U.S. oil inventory data that is expected to show stockpiles rose last week, U.S. December crude <CLc2> also dropped more than 4 percent, settling at $80.16 a barrel.
Trading volume was near 790,000 lots on Tuesday afternoon, just above the 30-day average of 768,063 lots, according to Reuters data.
In London, ICE Brent December crude <LCOc1> fell $3.27, or 3.88 percent, to settle at $81.10 a barrel.
The specter of China's dynamic economic growth slowing pressured oil and other commodity prices and sent investors to the safe-haven dollar to cut risk exposure. The inverse correlation of the dollar index <.DXY> and oil prices rose to the highest in about a month.
The dollar had already received lift late on Monday from comments by U.S. Treasury Secretary Tim Geithner that the United States would not engage in competitive currency devaluation. [
]A stronger dollar can pressure oil prices by making dollar-denominated oil more expensive to users of other currencies and by pulling investment into foreign exchange markets from commodities that are viewed as riskier bets.
"(The Chinese rate move) could imply a little bit of softer growth in commodities demand," said UniCredit's Jochen Hitzfeld.
Copper retreated from 27-month highs on top metals consumer China's interest rate hike. [
] Gold also fell as investors reacted to the stronger dollar. [ ]Economic concerns sent U.S. equities lower on Tuesday, as consumer-sensitive Apple <AAPL.O> and IBM <IBM.N> fell after their results disappointed investors. [
]"(Crude) could rebound and make this up tomorrow for no apparent reason. The fact that the market looks elsewhere and not fundamentals shows that the premium associated with exogenous elements will wax and wane and volatility will stay with us," said Mike Fitzpatrick, vice president at MF Global in New York.
U.S. OIL INVENTORIES
Investors focusing on fundamentals will get a snapshot of U.S. inventories from weekly reports from industry and government, starting with the report from industry group the American Petroleum Institute at 4:30 p.m. EDT (2030 GMT) on Tuesday.
U.S. crude stockpiles were expected to have risen last week, a Reuters survey on Monday showed, while oil products stockpiles were expected to have tightened. [
]The more closely watched oil inventory report from the U.S. Energy Information Administration is set for release at 10:30 a.m. EDT (1430 GMT) on Wednesday.
Another measure of fundamentals was mixed on Tuesday, as MasterCard reported U.S. retail gasoline demand rose 2.7 percent last week from the prior week, but dipped 0.9 percent from the year-ago period and was lower on a four-week average than the same period in 2009. [
]Energy investors continued to gauge the impact of the strike at France's Fos-Lavera oil port that has shut refineries and forced the French government to tap emergency fuel reserves. [
]Port officials said 47 oil tankers were blocked at the port [
] and strikes continued at all of France's 12 oil refineries, according to a CGT union official. [ ] (Additional reporting by Gene Ramos in New York, Zaida Espana and Isabel Coles in London and Alejandro Barbajosa in Singapore; Editing by Lisa Shumaker and Cynthia Osterman)