This study can make several important theoretical contributions. First, different from prior research that has mainly relied on senior executives’ demographic characteristics to capture their social interactions (Finkelstein et al., 2009), this study proposes that LSM between senior executives can offer a new, and probably more accurate channel to understand the nature and effectiveness of their social interactions. Unlike the use of content words, the use of function words is context independent. While ingratiation of CEOs by CFOs, reflected by CEO-CFO LSM, can benefit CFOs’ personal interest in terms of higher compensation and a higher likelihood of becoming a director on the focal firm’s board, such personal benefits may be traded off against the firm’s organizational interest as the CFO is less likely to voice dissent and play the role of “devil’s advocate” in strategic decision making process. In the absence of CFOs’ constructive opposition, CEOs are more inclined to undertake M&As, but such M&As tend to be associated with lower announcement returns. In comparison, we do not find any significant relationship between CEO-CFO LCM and the dependent variables examined in this study. As we discussed earlier, different from function word usage that is unconscious and context-free, content word usage is conscious and context-specific and thus CEO-CFO language content match in conference calls does not reflect their social interactions in other settings.