This paper examines the phenomenon that corporate executives tend to give irrelevant answers during performance briefings. Transcripts of performance briefings of companies listed on the SME and GEM are collected. Various textual analysis methods are used to measure the degree of management's irrelevant answers during performance briefings; and then the relationship between irrelevant answers and market reaction/the company's future performance is examined. The results show that after controlling other factors, there is a significant negative correlation between irrelevant answers and market reaction. For companies followed by fewer analysts, this negative correlation is more significant. Our findings also illustrate that providing irrelevant answers negatively affects a company's future performance.