Spain's Cepsa postponed what would have been the largest oil company listing in a decade on Oct. 15, the latest IPO to succumb to a global selloff in equity markets.

Cepsa's owner, Abu Dhabi state investor Mubadala, had planned to raise about 2 billion euros (US$2.3 billion) by selling 25% of Cepsa.

Markets have been roiled by anxiety about a potential trade war between the U.S. and China, uncertainty over Britain's exit from the European Union, a global economic slowdown and higher U.S. interest rates.

Spain's IBEX stock market index registered its biggest weekly fall since February at close on Oct. 12, and remains at two-year lows. The index opened down 0.15% on Oct. 15.

"The most recent international economic developments have sowed considerable uncertainty in international capital markets," Cepsa said in a statement.

"In this scenario, the appetite of international investors has retracted significantly, along with their willingness to participate in stock market listings such as the one being carried out by Cepsa," it said.

Mubadala will consider returning to the stock market when conditions become more favorable, Musabbeh Al Kaabi, chief executive of Mubadala's Petroleum and Petrochemicals platform, said.

"The feedback from potential investors reinforced our view of Cepsa's value and the strengths of the underlying business," Al Kaabi said in a statement.

Cepsa's float would be the biggest by an oil company in terms of proceeds since Brazil's OGX Petroleo e Gas in 2008.