By Amanda Cooper
LONDON, April 21 (Reuters) - European shares fell on Monday, led by a drop in shares of Royal Bank of Scotland <RBS.L> ahead of a widely expected and hefty rights issue and Swiss food group Nestle <NESN.VX> after a disappointing trading update.
Banks were the largest drag on the European market, after RBS confirmed in a brief statement that it was considering a rights issue, details of which could come on Tuesday.
People familiar with the matter have said the bank will seek to raise up to 12 billion pounds ($23.9 billion) and RBS shares fell by 3 percent.
Adding to the negative tone in the financial sector were results from Bank of America <BAC.N>, the largest U.S. retail bank, which reported a 77 percent drop in quarterly profit after $5 billion in writedowns and credit-related costs.
The FTSEurofirst 300 <
> index of top European shares fell 1.06 percent to 1,311.82 points.The index gained more than 3 percent last week after a flurry of positive earnings surprises on both sides of the Atlantic as the reporting season continues.
"Last week was a good week -- slightly surprising -- but good, so a bit of profit-taking today is no shock," said Philip Isherwood, a European strategist at Dresdner Kleinwort.
"I guess the feeling is that if you were going to warn, by now you should have warned and therefore, the first-quarter results season feels benign ... and that's supportive."
Within the banking sector, Barclays <BARC.L> lost 3.5 percent, Societe Generale <SOGN.PA> fell 1.7 percent and Credit Agricole <CAGR.PA> shed 3.4 percent.
The sector also appeared to take no heart from a Bank of England plan to lend banks up to 50 billion pounds to help operations during the credit squeeze.
JPMorgan said in a report that it estimates the capital shortfall for the four large UK banks -- RBS, HBOS <HBOS.L>, Barclays and Lloyds TSB <LLOY.L> -- at nearly 37 billion pounds.
"If UK banks do nothing, then shrinking balance sheets could imply 25-35 percent loss of earnings for the sector, according to our analysis," JPMorgan analyst Carla Antunes da Silva said in the report.
The bank estimates a capital shortfall of 13 billion pounds at RBS, 11.4 billion at HBOS, 8.1 billion at Barclays and 4.3 billion at Lloyds TSB.
Outside the banks, Nestle was among the heaviest weighted decliners, falling 1.7 percent as a jump in first-quarter sales disappointed some investors and a weak dollar eroded gains in volume and pricing.
Around Europe, Britain's FTSE 100 <
> fell 0.06 percent, while Germany's DAX < > lost 0.8 percent and France's CAC < > shed 1.0 percent.The commodities-heavy FTSE 100 was helped by gains in energy shares BP <BP.L>, Royal Dutch Shell <RDSa.L> and BG <BG.L>, which rose by more than 1 percent, tracking the oil price which stayed within striking range of a record $117.40 a barrel.
The FTSEurofirst 300 shed 16 percent in the first quarter as the world's top banks booked multi-billion dollar writedowns on assets backed by deteriorating U.S. mortgage products, but has rallied enough in April to put it on track for its best month since September 2005.
Analysts say earnings shocks and evidence of a U.S. recession could prevent any rallies from lasting very long.
"We've rallied quite strongly from the lows in the first quarter and now we're tending to level off," said Darren Winder, head of macro strategy and research at Cazenove.
"Investors are looking for new momentum from the earnings season and though results are overall probably better than people had expected, and profits still resilient, there's lots of scepticism that this will continue," he said.
Among gainers in Europe was Swiss drugmaker Novartis <NOVN.VX>, which jumped 3.1 percent as first-quarter net profit beat forecasts, boosting the pharmaceutical sector. GlaxoSmithKline <GSK.L> gained 1.1 percent, while AstraZeneca <AZN.L> rose 0.8 percent and Roche <ROG.VX> rose 0.5 percent. (Additional reporting by Dominic Lau and Sitaraman Shankar; Editing by David Cowell)