By Tommy Stubbington and Josie Cox 

European stocks finished largely flat Wednesday, as investors weighed a slight easing of tensions in Greek markets against some mixed corporate earnings.

The Stoxx Europe 600 ended little-changed, having swung between small gains and losses during the session.

France's CAC 40 index rose 0.4%, Germany's DAX lost 0.6%, while the U.K.'s FTSE 100 closed 0.5% lower.

Tesco PLC was among the biggest decliners, having given up early gains after the retailer reported a huge full-year loss amid a raft of charges, capping the most tumultuous year in its 96-year history.

Kone shares also fell sharply after the Finnish engineering firm posted disappointing first-quarter results.

Roche Holding AG climbed after the Swiss drug giant said strong growth of its core cancer franchise pushed sales 3% higher in the first quarter of the year. It confirmed its full-year guidance and suggested it would raise its dividend. Shares in Rolls-Royce Holdings also climbed sharply on news of a leadership change.

"Consensus forecasts for this European corporate reporting season look pretty demanding, but investors appear relaxed that their expectations will be met," said Ian Williams, economist and strategist at brokerage Peel Hunt.

Shares in Greek banks also rebounded along with Greek government bonds after heavy declines in recent days, as optimism increased that Athens may yet hammer out a deal with creditors to unlock further financing.

European Central Bank executive board member Benoît Coeuré told a Greek newspaper Wednesday that the ECB would continue to fund Greek banks as long as they stay solvent, but that the current situation in Greece is "clearly not sustainable" and that "quick and decisive action" was necessary.

Greek Prime Minister Alexis Tsipras is expected to meet with German Chancellor Angela Merkel at a summit in Brussels on Thursday, before eurozone finance ministers meet in Riga, Latvia, on Friday.

A deal on fresh aid, however, is unlikely to be agreed before the Eurogroup meeting on May 11, a day before Greece must pay EUR780 million ($838 million) due to the International Monetary Fund.

The Athex composite stock index rose 2.1%, with banks leading the way. It remains 13% lower since the start of the year. In bond markets, Greece's 10-year yield fell sharply to 12.6%. Two-year yields fell more than two percentage points to 26.7%. Yield rise as bond prices fall.

Still, Greek bond yields remain alarmingly high and a so-called inverted curve, where longer dated bonds yield less than those that are due for repayment sooner, indicates that investors are factoring in a sharply heightened probability of default.

"Given no discernible reform progress at technical or political levels, we expect both of these occasions to be nonevents that mark another missed opportunity for Greece to avoid a descent into financial oblivion, " said Emily Nicol, economist at Daiwa Capital Markets.

German 10-year bond yields rose to 0.16%, having touched an all-time low of 0.05% earlier this week.

Gold fell 1.2% to at $1,188 an ounce, while Brent crude was 1.1% higher at $62.75 a barrel.

In currency markets, the euro fell 0.1% against the dollar to $1.0724. Sterling rose 0.7% against the buck after the Bank of England's April meeting minutes showed two monetary policy committee members regarded leaving rates unchanged as a "finely balanced" decision.

Write to Tommy Stubbington at tommy.stubbington@wsj.com and Josie Cox at josie.cox@wsj.com

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