We analyze how directors with financial expertise affect corporate decisions. Using a novel panel data set, we find that financial experts exert significant influence, though not necessarily in the interest of shareholders. When commercial bankers join boards, external funding increases and investment-cash flow sensitivity decreases. However, the increased financing flows to firms with good credit but poor investment opportunities. Similarly, investment bankers on boards are associated with larger bond issues but worse acquisitions. We find little evidence that financial experts affect compensation policy. The results suggest that increasing financial expertise on boards may not benefit shareholders if conflicting interests (e.g., bank profits) are neglected.

We show that measurable managerial characteristics have significant explanatory power for corporate financing decisions. First, managers who believe that their firm is undervalued view external financing as overpriced, especially equity financing. Such overconfident managers use less external finance and, conditional on accessing external capital, issue less equity than their peers. Second, CEOs who grew up during the Great Depression are averse to debt and lean excessively on internal finance. Third, CEOs with military experience pursue more aggressive policies, including heightened leverage. Complementary measures of CEO traits based on press portrayals confirm the results.

We find evidence of systematic optimism and pessimism among credit analysts, comparing contemporaneous ratings of the same firm across rating agencies. These differences in perspectives carry through to debt prices and negatively predict future changes in credit spreads, consistent with mispricing. Moreover, the pricing effects are the largest among firms that are the most opaque, likely exacerbating financing constraints. We find that masters of business administration (MBAs) provide higher quality ratings. However, optimism increases and accuracy decreases with tenure covering the firm. Our analysis demonstrates the role analysts play in shaping investor expectations and its effect on corporate debt markets.