* FTSEurofirst 300 up 1.1 pct by midday
* Index recovers from steep losses on Thursday
* Banks, commodities lead gainers
By Sitaraman Shankar
LONDON, Oct 9 (Reuters) - European stocks rose by midday on Thursday, breaking a three-day losing streak, as the previous session's concerted global rate cut and UK bank bailout emboldened investors to buy battered financials and commodities.
At 1108 GMT, the FTSEurofirst 300 <
> index of top European shares was up 1.1 percent at 951.11 points, but still down more than 12 percent so far this week, placing it on track for its worst week on record.The index sank to its lowest close since December 2003 on Wednesday as investors worried about economic growth despite concerted rate cuts by the world's top central banks.
On Thursday, banks rose, led by Royal Bank of Scotland <RBS.L>, which jumped 14 percent, and HBOS <HBOS.L>, which jumped 29 percent.
Dexia <DEXI.BR> jumped 24 percent after France, Belgium and Luxembourg announced they had agreed to provide state guarantees for efforts by the troubled financial group to borrow.
The move was the latest in a series of attempts by governments across the world to stabilise a tottering financial sector, which have included bailout packages in the United States and the UK and the rescue of Fortis <FOR.BR> in Belgium.
"Today we see some sort of stabilisation, which is more of a technical reaction to recent falls," said Tammo Greetfeld, strategist at UniCredit in Munich.
"The central bank move is merely positive from the psychological point of view, as it calms down the situation somewhat and shows that central banks are able to act in a coordinated manner," he added.
"It doesn't change anything about the fear in money markets, the deteriorating economic conditions and negative company results and guidance."
Commodity shares rose, with miners BHP Billiton <BLT.L>, Anglo American <AAL.L>, Rio Tinto <RIO.L> and Xstrata <XTA.L> up 6-9 percent and oil shares BP <BP.L> and Total <TOTF.PA> up 2 and 3 percent respectively.
The FTSEurofirst 300 has fallen 37 percent so far this year, hit by a credit crisis that has frozen interbank lending, pushed banks deep into the red and slowed the economy, hitting several industrial sectors.
Underlining the severity of the problem, the cost of borrowing overnight dollars remained significantly above the Federal Reserve's new target rate, reflecting financial institutions' demand.
Three month borrowing on interbank markets remained expensive near this week's highs across all currencies and actual lending beyond a week remained frozen.
U.S. stock index futures <SPc1> <DJc1> <NDc1> were up 1.3-2.4 percent.
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The UK's FTSE 100 index <
> was up 1.3 percent, Germany's DAX index < > up 0.6 percent and France's CAC 40 < > up 2.2 percent.On top of slashing interest rates, the European Central Bank also halved the premium banks pay for emergency borrowing over its main refinancing rate.
The ECB also said it was raising the rate it would pay banks which deposited excess funds with it overnight, to 50 basis points below its main rate from 100 basis points below it.
"They're opening the floodgates for liquidity," said David Schnautz, interest rate strategist at Commerzbank in Frankfurt.
UniCredit's Greetfeld said he would like to see the UK bailout plan, which envisages the government taking stakes in banks and guaranteeing bond issues to an extent, replicated in other countries.
"Taking stakes in the banks, and guaranteeing a certain amount of bond issues is a better way of doing it than the U.S. bailout plan. Encouragingly (U.S. Treasury Secretary Henry) Paulson is also speaking of injecting equity in U.S. banks playing a bigger role, which is positive."
Other major movers included ArcelorMittal <MTP.PA>, which reaffirmed its third-quarter profit outlook and jumped 10 percent.
Siemens <SIEGn.DE> rose nearly 8 percent, boosted by a newspaper report that the engineering group planned to settle a U.S. Securities and Exchange Commission investigation earlier and for a smaller fine than previously expected.
A Siemens spokesman said it was still uncertain how proceedings in different countries might end. (Additional reporting by Blaise Robinson in Paris; Editing by Paul Bolding)