MADRID | By Julia Pastor | Abengoa’s strategy for 2013 included the creation of a company holding concessional assets to go public in  the U.S. market. The first step came on Monday when the Spanish firm submitted a draft registration statement to SEC for a yield company. So-called yieldcos in Wall Street’ jargon are financial vehicles that hold assets generating stable and predictable cash flow. The price of the operation remains unknown but its goal would be to raise about $1 billion for the company to continue reducing debt. The Seville-based company specialised in technology solutions for energy and environment sectors is listed in Nasdaq since October 2013.