European markets closed in the green on Thursday as the European Central Bank minutes from its July meeting hint towards further monetary policy action in September.

The minutes released today said the central bank is monitoring the global economy very closely after the U.K.'s vote to leave the European Union. The minutes cite the referendum 33 times and said that while  markets have weathered the Brexit shock waves, they were still volatile and that companies were below pre-referendum levels.

In London, the FTSE 100 finished at 6,868.96, 0.14% up.

Supermarkets surged in late trading after Walmart's (WMT - Get Report) results released in the U.S. showed their U.K. operation was not performing well.

Asda, Walmart's chain in the U.K., saw same-store sales drop by 7.5% in the second-quarter. In the first quarter sales fell by 5.7%. Walmart CEO Doug McMillion attributed the fall to the competitive environment and food deflation.

Asda competitors Sainbury's (JSAIY) , Morrisons and Tesco (TSCDY) saw shares rise 3.07%, 2.51% and 2.08% in afternoon trading.

The benchmark index was also propped up by miners as commodity prices rose. Antofagasta (ANFGY) gained 5.25% on Thursday. BHP Billiton (BHP) was up 2.77% and Anglo American (NGLOY) gained 1.65%.

In Frankfurt, the Dax was up 0.62% at 10,603.03 and the Cac 40 closed at 4,437.06, 0.44% up.

In Switzerland, Nestle (NSRGY) was up 1.47% after the company posted first-half sales growth that came in below expectations but reiterated its full-year guidance amid a pledge boost margins and underlying earnings per share in constant currencies.

Oil prices shot up in afternoon trading. West Texas intermediate was recently up 2.76% at $48.08 and Brent Crude was up 1.69% at $50.69 a barrel.