MADRID, May 21 (Xinhua) -- Spanish shares closed flat on Thursday, with the benchmark stock market index Ibex-35 up 0.04 percent, or 2.5 points, to end at 6,686.10 points.
The shares of 19 of the selected 35 large companies rose in the day with 16 losing value.
The International Consolidated Airlines Group (IAG) was the day's best performer with shares up 4.15 percent, while steel producer Acerinox rose 2.83 percent and clean energy producer Siemens Gamesa Renewable Energy gained 2.48 percent.
Petrochemical giant Repsol saw shares drop 3.34 percent, as Arcelormittal, another steel manufacturer, fell by 2.83 percent. The Bankinter savings bank lost 2.33 percent.