By Sara Sjolin, MarketWatch

Banks lead selloff

LONDON (MarketWatch) -- European stock markets kicked off the week in deep-red territory on Monday, as investors fretted over the intensifying standoff between Greece's new government and the EU, as well as about disappointing Chinese trade data.

Putting Greece firmly on collision course with its European partners, Prime Minister Alexis Tsipras on Sunday unveiled plans to unravel several austerity measures that were conditions for the country's 240 billion-euro ($272 billion) bailout program. He also reiterated calls for a bridge-loan program from international creditors, refusing to accept an extension to the current bailout agreement.

A bridge loan has so far been ruled out by Eurogroup head Jeroen Dijsselbloem, while on Monday, European Commission chief Jean-Claude Juncker warned that the eurozone can't accept all of Syriza's demands. The Eurogroup has called an emergency meeting for Wednesday.

The comments weren't greeted well by the financial markets, with the Athex Composite index slumping 5.5% to 758.84 on Monday. Piraeus Bank SA sank 14%, Eurobank Ergasias SA lost 12%, and National Bank of Greece SA shaved off 8.9%. Borrowing costs on 10-year Greek government bonds jumped 87 basis points to 11.029%, according to electronic trading platform Tradeweb.

Tsipras's speech came after he and Greek finance minister Yanis Varoufakis last week toured Europe, in a bid to drum up support for a new debt deal with greater leniency on repayments and austerity.

Amid the negotiation deadlock, Alan Greenspan, former chairman of the U.S. Federal Reserve, told the BBC he believes Greece will eventually leave the eurozone.

China trade jitters: Fresh data out of China added to the negative trading mood. Chinese exports and imports dropped sharply in January, suggesting both domestic and foreign demand are slowing down. Stocks in Asia closed mostly lower.

Stock reaction: In reaction to these worries, investors sold off European stocks. The Stoxx Europe 600 index dropped 0.9% to 370.01, with banks leading the move south. Shares of BNP Paribas SA fell 3.2%, BBVA SA (BBVA) lost 2.4%, and Standard Chartered PLC gave up 1.7%.

Germany's DAX 30 index slumped 1.4% to 10,695.76, while France's CAC 40 index lost 0.8% to 4,653.26. The U.K.'s FTSE 100 index dropped 0.6% to 6,815.62.

Movers: HSBC Holdings PLC (HSBC) gave up 1.4% after reports that the bank helped thousands of wealthy clients evade tax at its Swiss-based private bank. HSBC admitted in a statement it held accounts for a "number of clients that may not have fully met their applicable tax obligations."

Shares of Roche Holding AG lost 1.6% after Citigroup cut the Swiss pharmaceutical firm to neutral from buy.

Statoil ASA gained 2.2% after Morgan Stanley lifted the Norwegian oil producer to overweight from equal-weight.

Carrefour SA added 0.8% after Exane BNP Paribas raised the supermarket chain to outperform from neutral.

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