By Dominic Lau
LONDON, April 8 (Reuters) - Britain's top share index fell by mid-session on Tuesday after hitting a five-week closing high in the previous session, as lingering concerns over the credit crisis weighed on banks and miners tracked metal prices lower.
By 1030 GMT, the FTSE 100 <
> was down 55.7 points or 0.9 percent at 5,959.1, after closing above the psychologically key 6,000-mark on Monday for the first time since Feb. 17.The UK benchmark index has risen 4.5 percent so far this month, but is still down 7.7 percent for the year.
"We had a flat performance on Wall Street combined with disappointed results from Alcoa and ADM overnight," said Keith Bowman, an analyst at Hargreaves Lansdown.
"Adding to that, we've got house price details out today. That also weighs on the banking sector. Adding those two factors together, you have a market on the downside for the time being."
British house prices fell in March at their sharpest pace since the recession of the early 1990s, according to Halifax, the country's largest mortgage lender, raising expectations for a cut in interest rates this week.
Banks fell, shaving 18 points off the index, also weighed down by comments from the chief executive of French bank BNP Paribas <BNPP.PA>, who said worsening market volatility would make it difficult to meet the company's goal of matching last year's revenues.
Barclays <BARC.L>, Royal Bank of Scotland <RBS.L>, HSBC <HSBA.L>, HBOS <HBOS.L>, Lloyds TSB <LLOY.L> and Standard Chartered <STAN.L> were down between 0.9 and 3.5 percent.
Housebuilder Persimmon <PSN.L> topped the FTSE 100 losers, off 3.6 percent, while mid-caps Taylor Wimpey <TW.L> and Barratt Developments <BDEV.L> both fell around 4.5 percent.
European stocks were also down by midday, while U.S. stock futures fell pointing to a weaker opening on Wall Street and Asian shares sagged overnight.
Miners suffered because of weaker metal prices and after U.S. aluminium producer Alcoa <AA.N> said its first-quarter profit halved from a year ago because of energy costs and a weak dollar.
Lonmin <LMI.L> fell 3.1 percent, Xstrata <XTA.L> shed 1.9 percent, Vedanta Resources <VED.L> dropped 2.1 percent, Kazakhmys <KAZ.L> slipped 2.2 percent, Rio Tinto <RIO.L> lost 2.3 percent and BHP Billiton <BLT.L> eased 2.4 percent.
Investors will keep an eye on the minutes of the U.S. Federal Reserve's last meeting when it cut rates to 2.25 percent from 3.0 percent.
EARNINGS DOWNGRADE
ING Investment Management said the downturn in corporate earnings could last 12-18 months and stock markets were likely to trade sideways and remain volatile in coming months.
AstraZeneca <AZN.L> was down 2.4 percent after Goldman Sachs downgraded its rating on the drugmaker to "neutral" from "buy". The stock gained 14 percent last week after positive news about its Crestor drug and brokerage upgrades.
Tate & Lyle <TATE.L> lost 2.5 percent after Credit Suisse downgraded its rating on the sugar maker to "neutral" from "outperform".
Scottish & Southern Energy (SSE) <SSE.L> slipped 1.3 percent after Britain's energy regulator said it had launched an investigation into SSE and Scottish Power <IBE.MC> following a complaint alleging abuse of dominant market positions.
Food producers Unilever <ULVR.L> and Cadbury Schweppes <CBRY.L> gained 1.8 and 0.9 percent respectively. Traders said they benefitted from investors switching out of banks and miners.
BT Group <BT.L> advanced 1.2 percent after Britain's biggest fixed-line telecoms provider said it was promoting retail business head Ian Livingston to succeed Ben Verwaayen as chief executive. (Additional reporting by Peter Starck; editing by Rory Channing)