%0 Conference Proceedings %T Mining Evidences for Concept Stock Recommendation %A Liu, Qi %A Zhang, Yue %Y Walker, Marilyn %Y Ji, Heng %Y Stent, Amanda %S Proceedings of the 2018 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long Papers) %D 2018 %8 June %I Association for Computational Linguistics %C New Orleans, Louisiana %F liu-zhang-2018-mining %X We investigate the task of mining relevant stocks given a topic of concern on emerging capital markets, for which there is lack of structural understanding. Deep learning is leveraged to mine evidences from large scale textual data, which contain valuable market information. In particular, distributed word similarities trained over large scale raw texts are taken as a basis of relevance measuring, and deep reinforcement learning is leveraged to learn a strategy of topic expansion, given a small amount of manually labeled data from financial analysts. Results on two Chinese stock market datasets show that our method outperforms a strong baseline using information retrieval techniques. %R 10.18653/v1/N18-1191 %U https://aclanthology.org/N18-1191 %U https://doi.org/10.18653/v1/N18-1191 %P 2103-2112