The free trade zone "craze" on the Shanghai Stock Exchange reached a fever pitch on Friday, giving the market a slight boost despite the lackluster performance of other sectors.

Nearly 40 "concept stocks" linked to the Shanghai FTZ shot up by the daily limit of 10 percent shortly after the opening. The stocks were in various sectors, including construction, logistics, transportation and financial services. The list of concept stocks has expanded to include companies that may benefit from possible FTZs in other cities, including Tianjin, Qingdao and Chongqing.

Some of these stocks, such as Tianjin Quanyecheng (Group) Co Ltd, Minsheng Investment Management Co Ltd and transportation company Chongqing Gangjiu Co Ltd also rose by the daily limit in morning trading.