\input zb-basic \input zb-ioport \iteman{io-port 06001976} \itemau{Zhu, Yijun; Shan, Jingxuan; Zhou, Zonghao} \itemti{Study on a retrial double-ended queueing system with feedback.} \itemso{J. Jiangsu Univ., Nat. Sci. 32, No. 1, 120-124 (2011).} \itemab Summary: On the basis of the traditional double-ended queue, a retrial double-ended queueing system with feedback is studied for stock exchange. We propose that the buyers and sellers in business are at both ends in the queueing model, and that the customers at both ends are subject to Poisson distribution. A necessary and sufficient condition for the system in steady state is proved by embedding Markov chains. The Markov process is constructed by means of supplementary variable, and the differential equation is formulated. At last, the queue length of the system in the steady state is obtained by the probability generating function. \itemrv{~} \itemcc{} \itemut{retrial queue; feedback; double-ended; supplementary variable technique; probability generating function} \itemli{doi:10.3969/j.issn.1671-7775.2011.01.026} \end