By Tommy Stubbington 

European stocks shrugged off some patchy economic data Thursday, helped by a rise for shares on Wall Street.

The Stoxx Europe 600 index was 0.4% higher midmorning. The gains came despite a sharper-than-expected slowdown in euro-zone business activity and disappointing Chinese manufacturing data which weighed on Asian stocks.

Instead, markets took their cue from the U.S., where stocks rose, only wobbling briefly after minutes from the Federal Reserve's latest policy meeting that indicated officials debated whether they might need to raise rates sooner than expected.

Despite the discussions on policy tightening, investors generally remain comfortable that monetary policy will remain supportive.

"Inflation remains benign. Yes, people will worry about rates going up but they are not going up any time soon," said Julian Chillingworth, chief investment officer at Rathbones, which manages GBP23.9 billion ($39.7 billion) in assets.

The S&P 500 index gained 0.2%, as investors looked ahead to Fed Chairwoman Janet Yellen's speech at the annual Jackson Hole symposium. U.S. stock futures pointed to a further 0.2% rise at Thursday's open. Changes in futures aren't necessarily reflected in market moves after the opening bell.

That "will take center stage as investors gauge for more clues on Fed's view on the labor market and in turn monetary policies," said analysts at Crédit Agricole.

In the euro zone, purchasing managers data showed a slower-than-expected expansion in manufacturing and services activity in August.

The data continue a recent downturn which saw economic growth stagnate in the second quarter, amid concerns that the conflict in Ukraine could hold back the region's fragile recovery.

Even so, major European indexes climbed. Germany's DAX, which has fallen sharply in recent weeks, was 0.4% higher. France's CAC 40 gained 0.5%, while the U.K.'s FTSE 100 was up 0.3%.

"The overall message is that European growth is pretty anemic, but people have factored that in by now," said Mr. Chillingworth.

Safe-harbor German government debt has surged amid the recent signs of deterioration.

On Thursday, 10-year German bond yields traded at just below 1%, close to their recent all-time low. Yields fall as prices rise.

In currency markets, the euro inched up against the dollar to $1.3270, having dropped below $1.33 for the fist time since September last year on Wednesday.

The relatively hawkish minutes from the Fed should help fuel further gains for the greenback, while the European Central Bank is likely to maintain ultra-loose policy for some time, according to Lutz Karpowitz, a currency strategist at Commerzbank.

"ECB President Mario Draghi will now see the euro depreciate versus the dollar sooner than he had dared to hope. What we have been waiting for months is now actually happening: the Fed and the ECB are parting ways," he said.

Elsewhere in currency markets, the Norwegian krone surged to a two-month high of 8.1563 against the euro after Norway's economy expanded faster than expected in the second quarter.

In commodities markets, gold was 1.0% lower $1,282.20 an ounce. Brent crude oil was down 0.7% at $101.62 a barrel.

Write to Tommy Stubbington at tommy.stubbington@wsj.com