By Tommy Stubbington and Clare Connaghan 

European stocks edged higher Wednesday, notching a seventh straight day of gains, helped by signs that the U.S. economy continues to improve.

Elsewhere, the ruble weakened after Russia's finance minister said the country would resume buying foreign currencies for its depleted reserves fund in the coming days.

The benchmark Stoxx Europe 600 index closed 0.2% higher, with investors looking ahead to Thursday's European Central Bank policy meeting.

Expectations that the central bank could introduce further stimulus measures to stave off dangerously low inflation have buoyed markets over the past week, but many analysts and investors believe this week could be too soon for further steps.

"With the recent data on inflation the ECB has been pushed into a corner, but we don't believe they will do anything in a hurry," said Patrick Moonen, senior equity strategist at ING Investment Management. Mr. Moonen is bullish on European equities due to relatively cheap valuations and the potential for corporate earnings growth.

Germany's DAX added 0.2% while the U.K.'s FTSE 100 closed 0.1% higher. Italian stocks lagged behind, falling 1.0% as banks gave up some of their recent gains.

The moves came as the S&P 500 rose above Tuesday's record high, after private-sector employment rose nearly in line with forecasts in March, according to data compiled by Automatic Data Processing and Moody's Analytics. Although the report fell slightly short of forecasts, it helped cement the perception that the world's largest economy is strengthening after some weak data early this year, analysts said.

"The market does appear to be gradually becoming more confident on the U.S. economy as the data slowly improves," said Derek Halpenny, European head of global markets research at Bank of Tokyo-Mitsubishi, said.

Reassurance from U.S. Federal Reserve Chairwoman Janet Yellen on Monday--that low interest rates are still required to support the economy--continued to underpin sentiment across markets.

In other news, the ruble weakened more than 1.1%, as the dollar rose as high as 35.47 rubles after Russian Finance Minister Anton Siluanov's comments.

"The reason they [the Russian authorities] are doing it now is they have the view the situation has calmed down and that additional dollar purchases aren't going to push the [ruble any lower]," said Peter Kinsella, a currencies strategist at Commerzbank in London.

Russia's currency slumped to record low levels against the dollar and euro in early March as concerns over the country's actions in neighboring Ukraine hit markets. In March, Russia's central bank sold foreign currencies at its fastest clip since January 2009 to prop up the ruble.

The ruble has staged a recovery recently and currently trades at 35.286 against the buck, up around 4% from the record low it hit March 3.

Elsewhere in currency markets, the euro weakened slightly ahead of the ECB rate decision.

In corporate news, Deutsche Börse AG fell after U.S. authorities launched a criminal investigation into whether Clearstream Banking SA, a unit of Deutsche Börse, violated money-laundering laws and Iran sanctions.

Write to Tommy Stubbington at tommy.stubbington@wsj.com and Clare Connaghan at clare.connaghan@wsj.com

ING Groep NV (NYSE:ING)
Historical Stock Chart
From Mar 2024 to Apr 2024 Click Here for more ING Groep NV Charts.
ING Groep NV (NYSE:ING)
Historical Stock Chart
From Apr 2023 to Apr 2024 Click Here for more ING Groep NV Charts.