Extraction of causal and result information belong to business segments from securities reports

Abstract

In this research, we propose a method of extracting business segments from securities reports and extracting sentences including causal and result information concerning business performance for each extracted business segments. For example, our method extracts "In the aluminum rolled products business, shipments of high purity foils for aluminum electrolytic capacitors for industrial equipment and automotive use increased and sales increased." as a sentence including causal information concerning business performance. Moreover, our method estimates that the sentence belongs to business segment "aluminum". Our method extracts "As a result of this segment sales in this segment were 105,439 million yen, operating profit was 6,697 million yen." as the result information belong to "aluminum" segment.