Previous studies ignore the fact that employee stock options are warrants because these options have been an insignificant component of firms’ capital structures. I show that this assumption is no longer correct. For example, for more than 36% of my sample firms, employee stock options represent a more significant claim on firm value than the firm’s debt and preferred stock combined. Moreover, in contrast to the suggestions of previous research, I show that employee stock options are a significant claim on firms throughout the economy, including larger firms, older firms, and firms in “Old Economy” industries. Finally, I show that the presumption in prior studies that employee stock options are not warrants causes a potential misunderstanding of the risk-shifting interests of securityholders and biases the analysis of capital structure issues.

I investigate the relationship between the amount of information provided by a firm's comparables (i.e., firms in the same line of business as the firm being valued) and the precision of the firm's equity valuation. When investors have more information, previous studies argue that investors can make a more precise estimate of a firm's true equity value and this implies a lower (excess) stock return volatility around corporate events such as earnings announcements. I develop a simple model that shows a negative relationship between the amount of information provided by a firm's comparables and the firm's stock return volatility. Using alternative measures of information provided by comparables and different definitions of comparables, I consistently find a negative and significant relationship between these information measures and stock return volatility, ceteris paribus.