(Yicai Global) Jan. 29 -- China's stock markets  edged down this morning after a lackluster performance in the US and  European markets overnight. 

The Shanghai Composite Index opened down 0.18  percent at 2,592.35 points while the Shenzhen Component Index was down  0.19 percent at 7,575.43. The ChiNext Price Index, which tracks growth  enterprises in Shenzhen, was flat at 1,259.80 points.

Economic concern dragged down major European and US  bourses overnight. US stocks fell as several major firms such as  Caterpillar and Nvidia posted disappointing business data, many of which  cited weaknesses in the Chinese market as a key factor.