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European stocks climbed for a fourth day as a measure of U.S. manufacturing beat estimates, while investors awaited the outcome of a two-day summit of the European Union’s leaders.

EU leaders gathered in Brussels for a two-day summit. French President Francois Hollande earlier said that efforts to stem the debt crisis may unravel if member states fail to deliver on their promises. He called on the euro area to introduce a banking union, provide economic help to countries that reduce budget deficits, and show investors that Greece can stay in the single currency if it abides by its commitments.

The yield on Spain’s benchmark 10-year bonds fell to a six- month low after the country sold 4.61 billion euros ($6 billion) of securities due in 2015, 2016 and 2022. The government had planned to auction 4.5 billion euros of debt.

National benchmark indexes advanced in 10 of the 18 western-European markets today. France’s CAC 40 gained 0.2 percent and the U.K.’s FTSE 100 added 0.1 percent. Germany’s DAX climbed 0.6 percent.

Nestle slipped 1.7 percent to 61.20 Swiss francs for the biggest drag on the Stoxx 600. The world’s largest food company reported in a statement that revenue excluding acquisitions, divestments and currency swings gained 6.1 percent. The average estimate of 12 analysts surveyed by Bloomberg had called for sales to climb 6.3 percent.

Remy Cointreau plunged 8 percent to 80.24 euros, its biggest drop since March 2009. Organic revenue rose 13 percent in the six months through September, the company said. That missed the median estimate of nine analysts for an 18 percent gain. Revenue climbed 5.3 percent in the second quarter. It had surged 24 percent in the first three months of the fiscal year.

Akzo Nobel NV slid 4 percent to 42.78 euros after the paintmaker booked a 2.5 billion-euro writedown for its decorative-coatings business. The company overestimated market growth, Chief Financial Officer Keith Nichols said in a conference call today. Demand for its Dulux paint range has fallen. Akzo will introduce further cost-cutting measures to counter the slowdown, he said.