By Sara Sjolin, MarketWatch

LONDON (MarketWatch) -- U.K. stocks moved lower on Tuesday, with banks and resource firms leading the charge south, even as data showed inflation moved closer to the Bank of England's target in November and strengthened the case for maintaining low interest rates for longer.

The FTSE 100 index lost 0.4% to 6,494.60, after rallying the most since mid-October on Monday.

The benchmark opened in negative territory and remained lower after the Office for National Statistics said inflation fell to 2.1% in November from 2.2% in October, the lowest rate since November 2009. The slowdown brings inflation closer to the BOE's target of 2% and should reinforce the bank's commitment to keep interest rates low until unemployment falls.

"Inflation is under control and is unlikely to deal the killer blow to the BOE's forward-guidance policy," said Rob Wood, chief U.K. economist at Berenberg, in a note.

"It will probably drop below the Bank of England's 2% target in the second half of the year, providing much needed relief to squeezed households and allowing the Bank of England to keep interest rates at rock-bottom levels until 2015. Real wages could begin rising again in the first half of the new year, which helps drive our forecast of 2.6% GDP growth for 2014," he added.

Among notable movers in the London index, shares of Admiral Group PLC gave up 2.4% after the U.K.'s Competition Commission said it is looking into ways to lower car insurance costs. The move comes after a report on the GBP11 billion ($17.93 billion) industry showed motorists were shouldering unnecessary costs.

Oil firms were also on the decline, tracking oil prices lower. Shares of BP PLC (BP) dropped 1.5% .

Some mining firms dropped as most metals posted losses. Shares of Anglo American PLC lost 1% and BHP Billiton PLC (BHP) slipped 0.5%. There were some gainers, with Rio Tinto PLC (RIO) rose 1%.

Banks further dragged on the U.K. index, falling in line with the broader financial sector across Europe and weighed by fears that the U.S. Federal Reserve could announce a reduction in its bond buying at its policy-setting meeting on Wednesday. Barclays PLC (BCS) lost 0.9% and HSBC Holdings PLC (HSBC) dropped 0.8%.

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