By Carla Mozee, MarketWatch

LONDON (MarketWatch) -- European stocks rose Thursday, as gains for the London Stock Exchange Group PLC set the market's benchmark index on track for its first win in five sessions.

The Stoxx Europe 600 index rose 0.2% to 342.50. The index on Wednesday dropped 1.1%, the steepest decline since mid-April according to FactSet data, as equities keyed off a slide in U.S. equities.

Heading up advancers in Thursday's session was a 3.4% rise in London Stock Exchange after the exchange operator said it's acquiring U.S.-based asset manager Frank Russell Co. for $2.7 billion. LSE was the top gainer on the U.K.'s FTSE 100 index which rose 0.2% to 6,747.42.

Fresenius Medical Care AG popped up 2.9%, after a ratings upgrade at Credit Suisse to outperform from neutral on Thursday.

But shares of Barclays PLC dropped 5%, after New York Attorney General Eric Schneiderman launched a civil lawsuit against the bank on Wednesday. The suit alleges Barclays dramatically increased the market share of its dark pool through a series of false statements to clients and investors about how, and for whose benefit, the bank operates its dark pool.

Dark pools are private trading platforms that allow block trades and are designed to let firms make anonymous trades without disclosing their hands. In July 2012, the Bank of England pushed out Barclays's then-chief executive Bob Diamond a month after the lender was fined for rigging the Libor benchmark interest rate.

Among country indexes, France's CAC 40 index rose 0.2% to 4,470.57, and Germany's DAX 30 equity index gained 0.2% to 9,892.35.

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