論文誌 (国際) GINN: Gradient Interpretable Neural Networks for Visualizing Financial Texts
International Journal of Data Science and Analytics 2018
We are concerned with how to visualize financial documents in the way that even nonexperts can swiftly understand their sentiments. To achieve this, we propose a novel text visualizing method using interpretable neural network (NN) architecture called gradient interpretable NN (GINN). GINN can visualize the market sentiment score from a whole financial document and the sentiment gradient scores in both word and concept units. Moreover, GINN can visualize which concept is important considering sentence contexts. This type of visualization helps nonexperts easily understand financial documents. We theoretically analyze the validity of GINN and experimentally demonstrate the validity of text visualization produced by GINN using real financial texts.