* FTSEurofirst 300 index closes down 1.3 percent
* Banks under pressure; Citigroup concerns
* Commodities fall as crude, metals slip
By Joanne Frearson
LONDON, Dec 17 (Reuters) - European equities ended lower on Thursday, snapping a five-day winning streak, with concerns over tough new Basel regulations and Citigroup's <C.N> equity offering getting a cool response hurting banking stocks.
The pan-European FTSEurofirst 300 <
> index of top shares closed down 1.3 percent at 1,018.25 points. The index is up 58 percent since reaching a record low in early March and is up 23 percent for the year."The factors that are worrying the markets are Citigroup offering equities at a discount in order to raise capital, concerns about the Fed and then you got the dollar rising," said Peter Dixon, economist at Commerzbank.
"There are a lot of things going on. But we are rolling towards the end of the year and investors are taking risk off the table at a time when trading volumes are thin, so movements are exaggerated."
Banks were the top losers. HSBC <HSBA.L>, Societe Generale <SOGN.PA>, Lloyds Banking Group <LLOY.L> and Banco Santander <SAN.MC> were down 1.9-8.1 percent.
Citigroup <C.N> was down 6.7 percent on Wall Street after it sold $17 billion shares at $3.15 a share.
The sector was also knocked after regulators said big banks will have to set aside more profit or even raise capital protection under tough new proposals from the Basel Committee on banking. [
]The U.S. Federal Reserve said it would let most of its special liquidity facilities expire by early 2010 and global regulators proposed stricter capital rules for banks. [
]COMMODS UNDER PRESSURE
Energy stocks were under pressure as crude <CLc1> slipped 1.6 percent as the dollar rose. BG Group <BG.L>, BP <BP.L>, Royal Dutch Shell <RDSa.L> and Total <TOTF.PA> were 0.8 percent to 2 percent lower.
Miners were lower as copper <MCU3=LX> fell 2.3 percent, aluminium <MAL3=LX> lost 2.1 percent, and nickel <MNI3=LX> was down 2.4 percent.
Anglo American <AAL.L>, Antofagasta <ANTO.L>, BHP Billiton <BLT.L>, Eurasian Natural Resources Corporation <ENRC.L>, Rio Tinto <RIO.L> and Xstrata <XTA.L> were down 1.7-4.1 percent.
Investor confidence also deteriorated after the number of U.S. workers filing new applications for jobless insurance unexpectedly rose last week, bumped up by seasonal adjustments, according to government data. [
]The VDAX-NEW volatility index <.V1XI> showed investor appetite for risky assets such as equities fell. Charts suggested the index faced Fibonacci resistance at around 1,023 points -- its 38.2 percent retracement of the major fall from July 2007 to March 2009.
The index has failed to convincingly break the level despite repeated attempts in the past seven weeks.
"The FTSEurofirst's short term (technical) outlook is neutral. It's still very much within its range and it looks like it's struggling here," said Phil Roberts, technical analyst at Barclays Capital.
Across Europe, the FTSE 100 <
> index was down 1.9 percent, Germany's DAX < > was 1 percent lower and France's CAC 40 < > fell 1.2 percent. (Additional reporting by Atul Prakash; Editing by Dan Lalor)