“…Our paper makes several contributions to the extant literature. First, although the extant research (e.g., Balvers, Du, & Zhao, ; Chen & Gao, ; Gupta, ; Jung, Herbohn, & Clarkson, ; Kim, An, & Kim, ; Lee, Park, & Klassen, ; Li, Liu, Tang, & Xiong, ; Peng, Sun, & Luo, ; Sharfman & Fernando, ; Zhou, Zhang, Wen, Zeng, & Chen, ) focused on temperature shocks, managing climate/environmental risks and responding to the Carbon Disclosure Project (CDP) survey to examine market responses to firms' voluntary climate change information disclosure or their associations with the cost of debt financing/equity capital, this paper examines the dissemination effect of carbon‐related information via Twitter ( iCarbon ) on the COE. This broader effect is unlike that of disclosure and has its own capital market consequences (Bushee et al, ).…”