We examine the impact of fluctuations in investor demand for convertible securities on convertible bond issue volumes, pricing, and design. We find evidence of a positive impact of investor demand proxies on convertible bond issue volumes. We also document significantly lower convertible bond underpricing in periods with higher investor demand. The results hold in a variety of specifications, and are robust to controlling for firm-specific and macroeconomic financing cost proxies. However, we obtain only limited evidence that issuers adjust the design of their convertible bond offerings in response to investor demand.