By Sara Sjolin, MarketWatch

LONDON (MarketWatch) -- European stock markets held on to gains on Thursday after the European Central Bank left interest rates unchanged, with attention now turning to President Mario Draghi's press conference.

The Stoxx Europe 600 index traded 0.4% higher at 338.29, bringing it into positive territory for the week.

Shares of Bouygues SA gained 6.1% after the conglomerate offered 10.5 billion euros ($14.42 billion) to buy control of Vivendi SA's French telecom business SFR. Vivendi shares added 1%.

Shares of Aviva PLC rallied 9.2% in London after the insurer said adjusted operating profit increased 6% in 2013 as the value of new business rose.

Shares of Aggreko PLC jumped 6.9% after the temporary-power provider said it will return 200 million pounds ($333.76 million) to shareholders and raised its dividend by 10% after cutting debt.

Shares of Logitech International SA added 6.4% after the computer-accessories maker raised its earnings guidance and launched a $250 million share-buyback.

On a more downbeat note, shares of Balfour Beatty PLC slid 7.1% after the infrastructure firm said difficult market conditions in the U.K. and a significant downturn in the Australian mining-and-resource sector led to a "disappointing financial performance" in 2013.

More broadly, investors focused on central bank meetings. The European Central Bank left its main refinancing rate unchanged at a record low of 0.25% and kept the deposit rate at 0%. Attention now turns to Draghi's press conference at 1:30 p.m. in London or 8:30 a.m. Eastern, when the central bank could reveal other easing measures, such as ending SMP sterilization or launching another round of Long Term Refinancing Operations. Read: Draghi to reveal ECB decision: Time for action, finally?

The Bank of England also met on Thursday and -- as expected -- kept its interest rate a record low of 0.5% and made no change to its 375 billion ($627 billion) quantitative-easing program.

U.S. data are also on tap, with jobless-claims figures for last week due at 1:30 p.m. in London, or 8:30 a.m. Eastern. U.S. stock futures pointed to a higher open on Wall Street.

In Europe, France's CAC 40 index gained 0.6% to 4,418.02, buoyed by the gains for Bouygues. Germany's DAX 30 index added 0.2% to 9,562.03, and the U.K.'s FTSE 100 index advanced 0.2% to 6,786.87.

More must-reads from MarketWatch:

Where have all the shorts gone?

Polar Vortex set to slow February sales

Bernanke's $250,000 fee for speech puts him near top of food chain

Subscribe to WSJ: http://online.wsj.com?mod=djnwires

Logitech (NASDAQ:LOGI)
Historical Stock Chart
From Mar 2024 to Apr 2024 Click Here for more Logitech Charts.
Logitech (NASDAQ:LOGI)
Historical Stock Chart
From Apr 2023 to Apr 2024 Click Here for more Logitech Charts.