The present study has three objectives: 1) to investigate the prevalence of complex nominals in economic discourse represented via the selected business news texts, 2) to shed some light on the most common translation errors made by second year students in the Department of Translation in rendering complex nominals into Arabic, and 3) to detect the possible causes behind such translation errors and suggest some translation tips which might sound helpful to the students of translation to find the most suitable translation equivalent. The present study is based on an empirical survey in which a selective analysis of some economic texts represented in business news texts is made. A corpus of 159 complex nominals was selected from seven business news texts collected from the students' examination papers. It is hypothesized that many different errors will arise as a result of translating complex nominals as precisely as possible from English business news texts into Arabic. The results of the analysis revealed that the selected business news texts represented a serious challenge for second year translation students, and resulted in a number of various translation errors. It has been found that the students' low level of bilingual competence represented the major reason for translation errors. Study findings also revealed that lexico-semantic errors were the most common type of translation errors, followed by omission, grammatical errors, misreading and finally confusion.